OE Match

Pedal bushing upgrade kit for LHD and RHD cars.
Note: RHD cars also need Accelerator bell crank bushing 91442321101 which is not in the kit.
Not for Sportomatic SPM cars

Heavy duty brass pedal bushing kit contains:
(x2) Brake Pedal Bushings - 91142354201
(x2) Clutch Pedal Bushings - 91142334102
(x2) Accelerator pedal Bell Crank Bushings - 90142325300
(x1) Clutch Clevis Pin Bushing - 90142343400
(x1) Clutch Pedal Roll/Spring pin - 90030900200

Fits:
Porsche 911 1965-89
Porsche 912
Porsche 930 1976-88
excluding Sportomatic

Worn plastic brake pedal bushings or sticking accelerator bushing cause serious accidents. The ultimate solution is a set of Design 911 precision heavy duty brass pedal bushings. This is a comprehensive pedal box rebuild kit, with seven heavy duty bushings for the clutch cable arm, brake, clutch, and throttle pedals, and a new spring/roll clutch pedal retaining pin.

Sold as a set

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Replacement rubber pedal cover for clutch or brake.
It’s designed to fit tightly over the pedal arm face, providing the correct grip pattern and cushioning feel underfoot. Ideal for restorations, interior refreshes, or routine servicing, it helps keep pedal operation safe and consistent.
Sold each.

Fits:
Porsche 911 1970 - 1989 RHD or LHD Cars
Porsche 356 1950 - 1965 RHD or LHD Cars
Porsche 914 1970 - 1976 RHD or LHD Cars

Porsche 964 1990 - 1994 LHD Cars
Porsche 993 1994 - 1998 LHD Cars

The pad acts as a grippy wear layer over the pedal surface, improving pedal feel and protecting the metal pedal face from further wear while maintaining the original pedal appearance.

Old pedal rubbers harden, crack, or wear smooth over time, which can reduce grip and driver control. Replacing pad restores safety, improves pedal feel, and refreshes the cabin’s original finish.

When to replace:
• Pedal surface is smooth or slippery
• Rubber is cracked, split, or missing
• Pad feels loose on the pedal
• During interior refresh or pedal box service

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91442321000

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Brake Master Cylinder, Standard 19mm Bore.

The OE MATCH Brake Master Cylinder, Standard 19mm Bore is a hydraulic braking system component designed to convert brake pedal force into hydraulic pressure, allowing effective operation of the vehicle’s braking system. Featuring a standard 19mm bore, this master cylinder replicates the original factory specification, providing the correct hydraulic balance, pedal feel, and braking performance intended by Porsche.
For Cars With Stop Light Switch.
NOTE: Does Not Come With New Switch. Has To Be Transferred Over Or Bought Separately. Part Number 90161311500

Fits:

• Porsche 911 1965-1968 2.0L / 912 SWB (F)
• Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
• Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
• Porsche 911 1978-1983 3.0L / SC
• Porsche 911 1975-1977 3.0L Turbo (930)
• Porsche 914 (1970-1976)  

The master cylinder is engineered for precise brake modulation, reliable fluid pressure generation, and long-term durability. As the central component of the braking system, it distributes hydraulic pressure to the brake calipers or wheel cylinders, ensuring safe and predictable vehicle stopping performance.

What This Product Does:

• Converts brake pedal force into hydraulic pressure
• Distributes brake fluid pressure throughout the braking system
• Provides the correct hydraulic volume for standard braking setups
• Maintains original factory brake pedal feel and response
• Supports safe and consistent braking performance
• Works with dual-circuit braking systems for added safety

Symptoms Of Wear Or Failure:

• Soft or spongy brake pedal feel
• Brake pedal slowly sinking under sustained pressure
• Reduced braking performance or longer stopping distances
• Brake fluid leakage around the master cylinder
• Inconsistent brake pressure or uneven braking response
• Difficulty maintaining hydraulic pressure
• Brake warning lights illuminating
• Internal seal deterioration causing fluid bypass and pressure loss

Why Replacement Matters:

• Restores proper hydraulic brake pressure
• Improves brake pedal feel and responsiveness
• Maintains factory braking characteristics and performance
• Prevents brake fluid leaks and pressure loss
• Supports safe operation of the dual-circuit braking system
• Reduces the risk of brake system failure
• Ensures predictable and consistent stopping performance
• Helps maintain driver confidence and vehicle safety under all driving conditions

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91135501202

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Brake Master Cylinder BIG BORE, 23mm High Performance Version.

The OE MATCH Brake Master Cylinder BIG BORE is a hydraulic braking component designed to convert brake pedal force into hydraulic pressure for the vehicle’s braking system. Featuring a larger bore design, this master cylinder is engineered to provide increased fluid displacement, making it particularly suitable for vehicles fitted with upgraded brake calipers or performance braking systems that require greater hydraulic volume.

Fits:

• Porsche 911 1965-1968 2.0L / 912 SWB (F)
• Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
• Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
• Porsche 911 1978-1983 3.0L / SC
• Porsche 911 1975-1977 3.0L Turbo (930)
• Porsche 914 (1970-1976)  

This is a high performance upgrade to the stock Porsche 911 Master Cylinder for non-power brake applications. The increased 23mm bore (vs. 19mm) should be used on cars that are fitted with 'larger than stock' brakes to increase pedal pressure and feel. Unlike other kits on the market, which require modifications to the lines and the push rod, our Master Cylinder is a direct fit.

The master cylinder is designed to deliver precise brake pedal feel, consistent hydraulic pressure, and reliable braking performance. As the central component of the hydraulic braking system, it plays a critical role in ensuring safe, responsive, and predictable stopping power.

What This Product Does:

• Converts brake pedal input into hydraulic pressure
• Supplies brake fluid pressure to the braking system
• Provides increased fluid displacement through its larger bore design
• Supports performance and upgraded brake system applications
• Maintains consistent brake pedal feel and braking response
• Works with dual-circuit braking systems for enhanced safety

Symptoms Of Wear Or Failure:

• Soft or spongy brake pedal feel
• Brake pedal slowly sinking under pressure
• Reduced braking effectiveness
• Brake fluid leaks around the master cylinder
• Inconsistent brake pressure or pedal response
• Difficulty building hydraulic pressure
• Brake warning lights illuminating
• Internal seal wear causing pressure loss between circuits

Why Replacement Matters:

• Restores correct hydraulic pressure throughout the braking system
• Improves brake pedal feel and responsiveness
• Ensures consistent and predictable braking performance
• Prevents brake fluid leaks and pressure loss
• Supports safe operation of dual-circuit braking systems
• Maintains compatibility with performance brake upgrades
• Reduces the risk of braking system failure
• Helps preserve driver confidence and vehicle safety under all driving conditions

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Brake caliper seal repair kit.
This OE Match-standard brake caliper seal repair kit is engineered as a direct-fit replacement for the rear brake caliper sealing components on classic Porsche 911 models. This kit supplies the essential gaskets, seals and dust boots needed to rebuild the brake caliper’s sealing surfaces accurately.
Sold per caliper.


Porsche 911 1984-89 (Rear)

This kit is sold on a per-caliper basis - for reconstructing or refreshing one rear brake caliper’s internal seals and dust protection.

In a brake caliper, seals and dust boots play a critical role in maintaining hydraulic integrity and protecting internal components from dirt and moisture. Over time seals can harden, crack or shrink, leading to fluid leaks, reduced braking performance, and uneven pad wear. This kit provides the correct rubber components to refresh the caliper sealing surfaces, allowing pistons to move freely while maintaining fluid pressure and protecting against contamination.

Function
• Hydraulic Seal Function: Prevents brake fluid leakage from the caliper piston bore under pressure.
• Dust Protection: Dust covers keep contaminants out of the caliper internals, reducing corrosion and wear.
• Restore Performance: Helps return caliper piston travel and braking response to as-designed levels.
• Durability: rubber materials resist heat, fluid exposure and aging typical of high-stress brake system environments.

Brake caliper seals and dust boots wear with age and use. When the seals degrade, brake fluid can leak at the caliper piston, reducing hydraulic pressure, degrading braking performance, and potentially causing uneven pad wear or pulling under braking. Dust boots that are cracked or missing allow grit and moisture into the caliper bore, accelerating corrosion and piston binding. Replacing these with an OE Match kit helps restore correct brake function, maintain consistent pedal feel, and extend the life of your brake calipers.

Replace the brake caliper seal kit if you notice:
•  Brake fluid leaks around the caliper piston seal.
•  Spongy or inconsistent brake pedal feel.
•  Uneven pad wear or reduced braking performance.
•  Cracked, hardened or missing dust covers.
•  During a full brake overhaul or rebuild.



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Brake Caliper seal repair kit, FRONT.
This brake caliper seal kit is designed to rebuild the front brake calipers of classic Porsche 911 models (1974-89) (non-turbo). It includes all the sealing rings, dust boots, and fasteners necessary to rebuild a single caliper, ensuring proper hydraulic sealing, piston movement, and reliability. Manufactured to original Porsche specifications.
Sold per caliper


Porsche 911 1974 - 1989


•  Position on Vehicle: Front axle brake calipers, service train of the front brake system.

•  Applications: Ideal when the original caliper pistons or seals have been serviced, when you observe brake lever/root pressure changes, when brake fluid contamination has occurred or during a full caliper rebuild.

The sealing components within a brake caliper are critical to safe and effective braking performance. Worn or damaged seals can lead to piston sticking, brake drag, uneven pad wear, reduced braking efficiency or fluid loss. Replacing with a correctly specified rebuild kit restores hydraulic integrity, ensures smooth piston operation and helps maintain your 911’s original braking feel.

When and why to replace:
• Caliper pistons are sticking or moving unevenly.
• Visible damage to dust boots or signs of fluid leakage around the caliper.
• Uneven pad wear or brake performance inconsistency.
• During brake pad or rotor replacement when calipers are open.
• High-mileage vehicles or cars where original seals have not been replaced.

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Brake caliper seal repair kit, REAR.
OE Match rear brake caliper seal repair kit designed to service the rear brake calipers on classic Porsche 911 (1974–1983) models. Now you can restore your brake calipers performance with our Rebuild Kits. Each kits includes the necessary seals and dust covers that you will need for the rebuild process.
Sold per caliper.


Porsche 911 1974 - 1983

The brake caliper seal kit replaces the internal piston seals, dust boots, and associated rubber components within the rear brake caliper. These seals perform essential functions:
•  Maintain brake fluid integrity inside the caliper piston bore
•  Prevent fluid leakage under hydraulic pressure
•  Protect internal components from dirt, moisture, and debris
•  Enable smooth piston movement for consistent brake pad engagement
•  Help ensure even pad wear and reliable stopping performance.

Over time, original caliper seals harden, crack, or lose elasticity, which can lead to leaking, sticking pistons, uneven braking, and reduced safety.

Function
•  Hydraulic sealing: Ensures brake fluid stays within the caliper bore
•  Piston movement control: Allows smooth, controlled piston travel
•  Dust and dirt exclusion: Prevents contaminants from entering the caliper bore
•  Brake performance preservation: Helps maintain even pad engagement and return.

A properly rebuilt caliper with new seals helps restore brake responsiveness and reduces the risk of brake drag or uneven braking at the rear wheels.

Brake caliper seals are critical for hydraulic braking performance and safety. Old seals often suffer from: • Hardening and cracking due to heat and age • Swelling or deformation from fluid contamination • Loss of elasticity, causing piston bind or leak paths • Corrosion of caliper bores when moisture enters through failed dust boots Worn or leaking seals result in reduced brake performance, fluid leakage, uneven pad wear, brake drag, and compromised stopping power. Replacing them with an OE Match seal kit restores proper fluid retention and piston mobility - increasing safety, consistency, and brake system longevity. When to replace. Install this rear brake caliper seal kit when: • Calipers are leaking fluid around the piston area • Brake pistons stick or bind, causing brake drag • You are performing a full caliper overhaul • Pads and rotors are replaced and calipers are difficult to service • Dust boots are torn, brittle, or missing. A seal kit is a core part of brake caliper rebuilds and should be considered whenever the caliper is disassembled.

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Front Brake Caliper Seal Kit for S Type Calipers - 1 kit per caliper - 2 required per car

Maintain safe, reliable and responsive braking performance with Front Brake Caliper Seal Kit, designed for Porsche 911 models equipped with S Type front brake calipers. This comprehensive seal kit contains the essential sealing components required to rebuild and restore original brake calipers, helping preserve hydraulic pressure and ensuring consistent braking performance.

Fits:

• Porsche 911 1965-1968 2.0L / 912 SWB (F)
• Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
• Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera

Brake caliper seals are critical components within the braking system. They seal the hydraulic fluid behind the caliper pistons, allowing braking pressure to be applied efficiently while protecting internal components from dirt, moisture and corrosion. As seals age, they can become brittle, worn or damaged, leading to fluid leaks, sticking pistons and reduced braking performance.

Replacing worn caliper seals is an important part of Porsche brake maintenance and restoration, particularly for classic 911 models where preserving original braking components is often preferred.

What Does a Brake Caliper Seal Kit Do?

A brake caliper seal kit provides the replacement seals required during a brake caliper rebuild. These seals maintain hydraulic integrity within the caliper and ensure the pistons operate smoothly under braking pressure.

A properly rebuilt caliper helps provide:

Consistent hydraulic pressure Reliable braking performance Smooth piston movement Protection against fluid leaks Reduced risk of internal corrosion Extended brake caliper service life

Without effective seals, brake fluid can escape and braking efficiency can be significantly reduced.

Symptoms of Worn or Failing Brake Caliper Seals

Brake caliper seals are constantly exposed to heat, pressure and brake fluid. Over time, the sealing material can deteriorate and lose its ability to maintain proper hydraulic pressure.

Common symptoms of failing caliper seals include:

Brake fluid leaks around the caliper Soft or spongy brake pedal Reduced braking performance Loss of hydraulic pressure Sticking or seized pistons Uneven brake pad wear Brake drag Corrosion around piston surfaces Increased stopping distances Visible deterioration of seals during inspection

If ignored, worn seals can lead to more extensive caliper damage and compromised braking safety.

Why Brake Caliper Seal Replacement Matters

Replacing worn brake caliper seals is one of the most effective ways to restore braking performance and preserve valuable original brake calipers.

Benefits of replacing caliper seals include:

Restored hydraulic efficiency Elimination of brake fluid leaks Improved braking response Better brake pedal feel Reduced brake drag Protection against corrosion Extended caliper lifespan Improved braking safety and reliability

For classic Porsche 911 models fitted with S Type calipers, regular caliper maintenance helps preserve the vehicle's original braking characteristics and driving experience.

Features & Benefits

• Suitable for Porsche 911 S Type front brake calipers
• Contains seals required for brake caliper rebuilds
• Restores hydraulic sealing performance
• Helps eliminate brake fluid leaks
• Supports smooth piston operation
• Protects against moisture and contamination
• Ideal for brake restoration and maintenance projects
• Helps extend brake caliper service life       

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Brake caliper seal repair kit. REAR
Repair kit designed to rebuild the rear brake calipers of classic Porsche 911 models from the 1969–77. This kit includes all necessary sealing rings, dust boots and associated hardware required to restore proper hydraulic operation and sealing integrity of the “M-type” steel calipers.
Sold per caliper.


Porsche 911 1969-77 REAR.
"M" type The S calipers are aluminium and the M calipers are steel

• Position: Rear axle brake caliper assembly—used to rebuild one caliper (sold each).

•  Applications: Ideal for use when calipers show signs of leakage, piston sticking, seal degradation or during full brake system overhaul/restoration.

Brake caliper seals and boots are crucial for maintaining hydraulic function, preventing fluid leaks and ensuring piston mobility. When seals wear out, you may experience brake drag, uneven pad wear, reduced stopping performance or fluid leakage. Replacing with a correctly specified kit ensures safe, consistent braking under all conditions.

When and why to replace:
• Visible brake fluid leakage around the caliper body or piston boot.
• Caliper pistons sticking or uneven pad wear.
• Brake overhaul where pistons are removed and seals are exposed.
• Restoration of vehicles where the original seal kit has not been replaced in decades.

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Porsche Front Brake Caliper Seal Kit - M Type caliper
1 kit per caliper - 2 required per car

Restore the performance and reliability of your braking system with Front Brake Caliper Seal Kit, designed for Porsche 911 models equipped with M Type front brake calipers. This essential brake caliper rebuild kit contains the seals required to overhaul worn or ageing brake calipers, helping restore hydraulic efficiency and ensuring consistent braking performance.


Fits:

• Porsche 911 1965-1968 2.0L / 912 SWB (F)
• Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
• Porsche 911 1974-1975 2.7L 

Brake caliper seals play a vital role in maintaining hydraulic pressure within the braking system. They prevent brake fluid leakage, protect internal caliper components from contamination and allow the caliper pistons to move correctly during braking. Over time, exposure to heat, moisture, brake fluid and age can cause seals to harden, crack or deteriorate, compromising braking performance and safety.

Replacing worn caliper seals is a key part of brake system maintenance and restoration, particularly on classic Porsche models where original components may have been in service for decades.

What Does a Brake Caliper Seal Kit Do?

A brake caliper seal kit provides the essential sealing components required to rebuild and restore brake calipers. The seals maintain hydraulic pressure behind the caliper pistons while also preventing dirt, moisture and contaminants from entering the caliper assembly.

Correctly functioning caliper seals help provide:

Reliable hydraulic pressure Consistent braking performance Smooth piston operation Protection against brake fluid leaks Reduced internal corrosion Improved caliper longevity

Without effective seals, brake fluid can escape and braking performance may be compromised.

Symptoms of Worn or Failing Brake Caliper Seals

Brake caliper seals naturally deteriorate over time due to age, heat cycles and exposure to brake fluid.

Common symptoms of worn caliper seals include:

Brake fluid leaks around the caliper Soft or spongy brake pedal Reduced braking performance Loss of hydraulic pressure Uneven brake pad wear Sticking or dragging brakes Contaminated brake components Visible cracking or deterioration of seals Corrosion around caliper pistons Increased stopping distances

In severe cases, seal failure can lead to significant fluid loss and reduced braking safety.

Why Brake Caliper Seal Replacement Matters

Replacing worn brake caliper seals helps restore braking system reliability and prevents more expensive caliper damage.

Benefits of replacing caliper seals include:

Restored hydraulic pressure Elimination of brake fluid leaks Improved braking performance Smoother piston movement Reduced brake drag Improved brake pedal feel Protection against corrosion and contamination Extended brake caliper service life

For classic Porsche 911 models, regular caliper maintenance is essential to maintain the precise braking characteristics and safety standards expected from the vehicle.

Features & Benefits

• Suitable for Porsche 911 M Type front brake calipers
• Contains seals required for caliper overhaul and rebuild
• Restores hydraulic sealing performance
• Helps eliminate brake fluid leaks
• Supports smooth piston operation
• Ideal for brake restoration and maintenance projects
• Helps extend brake caliper lifespan
• High-quality replacement sealing components       

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Front Brake Calipers 

Restore safe, responsive braking performance with Front Brake Calipers, designed for Porsche 924S, Porsche 944 and Porsche 944S models. These front brake calipers are a critical part of the braking system, converting hydraulic pressure from the brake pedal into the clamping force needed to press the brake pads against the brake discs.

Fits:

• Porsche 924S 2.5L 1986-87
• Porsche 924S 2.5L 1988
• Porsche 944 2.5L 8V 1982-87
• Porsche 944 2.7L 8V 1988-89
• Porsche 944S 2.5L 16V 1987-88

As the primary braking components at the front axle, the calipers are responsible for delivering much of the vehicle's stopping power. Properly functioning calipers ensure consistent braking performance, balanced stopping force and predictable pedal feel, helping maintain the handling and safety characteristics Porsche engineered into these transaxle sports cars.

Over time, brake calipers can suffer from corrosion, sticking pistons, worn seals and fluid leaks. Replacing worn or damaged calipers helps restore braking efficiency, reduce uneven wear and improve driver confidence.

What Do Front Brake Calipers Do?

Brake calipers form the link between the hydraulic braking system and the brake pads. When the brake pedal is pressed, hydraulic fluid pressure forces the caliper pistons outward, pushing the brake pads against the rotating brake disc.

This process creates friction which slows and stops the vehicle.

A properly functioning front brake caliper helps provide:

Strong and consistent braking performance Accurate pedal response Balanced braking force across the front axle Even brake pad wear Improved vehicle control Reliable stopping power in all driving conditions

Symptoms of Brake Caliper Wear or Failure

Brake calipers operate under extreme conditions and are constantly exposed to heat, moisture, brake dust and road contaminants. As components age, internal pistons and seals can become damaged or seized.

Common symptoms of brake caliper failure include:

Vehicle pulling to one side when braking Uneven brake pad wear Reduced braking performance Soft or inconsistent brake pedal feel Sticking or dragging brakes Excessive brake dust on one wheel Overheating brake discs Brake fluid leaks Squealing or grinding noises Increased stopping distances Burning smell from overheated brakes

If left unresolved, a faulty brake caliper can cause accelerated wear of pads and discs while compromising braking safety.

Why Brake Caliper Replacement Matters

Replacing worn or damaged brake calipers is essential for maintaining safe braking performance and preventing costly secondary damage to other braking components.

Replacement helps:

Restore full braking efficiency Improve pedal feel and braking response Eliminate brake drag and overheating Prevent uneven brake pad wear Reduce brake fluid leakage risks Maintain balanced braking performance Improve vehicle safety and control Protect discs and pads from premature wear

For Porsche 924S, 944 and 944S models, maintaining a healthy braking system is vital for preserving the exceptional handling and driver confidence these vehicles are known for.

Features & Benefits

• Restores reliable braking performance
• Supports strong and consistent stopping power
• Maintains correct pedal feel
• Helps ensure even brake pad wear
• Ideal for maintenance, repair and restoration projects
• Direct replacement for worn or faulty calipers

Keep your Porsche braking system performing at its best with Front Brake Calipers from Design911.

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Brake caliper REAR. 
These are direct replacement calipers for the rear left (part number 91135242500) or rear right (part number 91135242600) side of a mid-1980s Porsche 911. They are manufactured to the dimensions, fitment, and technical specifications of the original. Replacing these calipers restores the correct brake pressure, pad alignment, and brake disc-to-rear wheel contact, restoring braking balance and safety.


Porsche 911 1984 - 1989

Brake calipers are crucial for safe, controlled stopping. Over time, calipers can suffer from corrosion, seized or sticking pistons, worn seals, fluid leakage or uneven pad wear. Especially on aging cars, the rear calipers may lose proper clamping force, causing longer stopping distances, uneven braking, noise or poor pad life.

Replace these calipers when you notice:
• Brake fluid leakage around the caliper body or piston area
• Uneven or rapid pad wear on the rear wheel
• Reduced braking performance, dragging wheel or vibration
• Maintenance/restore of the braking system during a rebuild

Installing a correct-fit caliper restores proper braking clamp, pad and rotor alignment and ensures your classic Porsche retains its intended braking performance and safety.

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Front Brake Calipers 

Restore confident braking performance with Front Brake Calipers, designed for Porsche 911 3.2 Carrera models from 1984 to 1989. Positioned at the front axle, these calipers are essential braking components responsible for applying clamping force to the brake discs, helping slow the vehicle safely and consistently.

Fits:

• Porsche 911 1984-1986 3.2L
• Porsche 911 1987-1989 3.2L G50

Brake calipers work together with the brake pads, discs and hydraulic braking system. When the brake pedal is pressed, brake fluid pressure forces the caliper pistons to push the pads against the disc, creating friction and reducing vehicle speed. Because the front brakes handle a large proportion of braking force, properly functioning front calipers are critical for safe road use and predictable braking performance.

Over time, calipers can suffer from corrosion, seized pistons, worn seals, fluid leaks and uneven pad movement. Replacing worn or faulty front calipers helps restore braking balance, pedal feel and stopping confidence.

What Do Front Brake Calipers Do?

Front brake calipers convert hydraulic pressure from the braking system into mechanical clamping force. This force presses the brake pads against the rotating brake discs, generating the friction needed to slow or stop the vehicle.

Correctly functioning front calipers help provide:

Strong and consistent braking force Stable pedal feel Balanced front braking performance Even brake pad wear Reliable stopping power Improved safety in everyday and spirited driving

Symptoms of Brake Caliper Wear or Failure

Brake calipers operate in a harsh environment and are exposed to heat, road debris, moisture and brake dust. Over time, internal seals, pistons and sliding surfaces can deteriorate.

Common symptoms of worn or failing front brake calipers include:

Vehicle pulling to one side under braking Uneven brake pad wear Brake fluid leaks around the caliper Spongy or inconsistent brake pedal feel Reduced braking performance Brake drag or sticking brakes Excessive brake dust on one wheel Burning smell after driving Overheating brake disc or wheel Squealing, grinding or rubbing noises Brake warning light caused by fluid loss

If a caliper piston sticks or a seal fails, braking performance can become unpredictable and unsafe.

Why Brake Caliper Replacement Matters

Replacing worn or faulty front brake calipers is essential for restoring safe and predictable braking performance. A failing caliper can cause brake imbalance, overheating, premature pad and disc wear and reduced stopping power.

Replacement helps:

Restore correct braking force Improve pedal feel and response Prevent brake drag and overheating Reduce uneven pad and disc wear Eliminate hydraulic fluid leaks Maintain balanced braking performance Improve safety and driver confidence

For a classic Porsche 911 3.2 Carrera, maintaining the braking system in excellent condition is vital for preserving the driving experience and safety the car was engineered to deliver.

Features & Benefits

• Restores reliable braking performance
• Supports strong and consistent stopping power
• Helps maintain correct brake pedal feel
• Ideal for maintenance, repair and restoration projects
• Direct replacement for worn or damaged original calipers

 Keep your Porsche 911 3.2 Carrera braking system performing safely and consistently with front brake calipers from Design911

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Brake caliper FRONT
Caliper fixing points are 90mm apart.


Porsche 911 1974 - 1983 2.7L / 3.0L SC

These OE match front brake calipers are direct replacement units engineered to replicate the original Porsche “A-Type” calipers fitted to 911 models from 1974 to 1983. Designed for vehicles equipped with 2.7L and 3.0L SC engines, they integrate seamlessly into the factory braking system.

Each caliper is side-specific and sold separately:
  • Left (driver side): 91135142502
  • Right (passenger side): 91135142602

These units are designed for direct bolt-on installation and are compatible with original brake discs and pads, making them ideal for restoration, maintenance, or performance reliability upgrades.

The brake caliper clamps the brake pads against the brake disc when the brake pedal is pressed. This creates friction, slowing the rotation of the wheel and bringing the vehicle to a controlled stop. The fixed design ensures consistent braking performance and even pad wear.

Function
•   Applies braking force to discs via brake pads
•   Distributes pressure evenly across the braking surface
•   Converts hydraulic pressure into mechanical braking force
•   Supports stable, controlled stopping performance
•   Ensures consistent braking response under load

Brake calipers are exposed to heat, moisture, and constant mechanical stress. Over time, seals can degrade, pistons can seize, and corrosion may affect performance. Worn calipers can lead to uneven braking, reduced stopping power, and increased wear on discs and pads. Replacing them restores braking efficiency, safety, and driving confidence.

When to replace
•  Brake caliper sticking or seized piston
•  Uneven brake pad wear
•  Reduced braking performance or pulling to one side
•  Fluid leaks around caliper seals
•  During brake system overhaul or restoration

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Air mass / flow sensors
This sensor measures the amount of air entering the engine’s intake system and sends this data to the engine control unit (ECU) so the correct amount of fuel can be injected. The OE Match sensor is designed to replace the factory-installed component used on Porsche 993 engines. It uses modern sensing technology to accurately detect airflow and transmit the information to the engine control system. This part is commonly replaced during engine troubleshooting or maintenance when airflow readings become inaccurate due to contamination or internal sensor wear.

Fits:
Porsche 993 C2 / C4 1994 - 1998

The sensor monitors the amount and density of air entering the engine and sends this information to the ECU. The ECU uses the signal to calculate the optimal air-fuel mixture required for efficient combustion, engine performance and fuel economy.

If the sensor fails or sends incorrect data, the engine may run too rich or too lean, leading to poor performance or increased fuel consumption.

Function
•  Airflow Measurement: Detects the mass of air entering the engine intake
•  Fuel Control: Helps the ECU determine the correct fuel injection quantity
•  Engine Efficiency: Supports optimal combustion and fuel economy
•  Performance Stability: Maintains smooth engine operation and throttle response

MAF sensors are exposed to intake airflow, contaminants and heat, which can gradually affect sensor accuracy. When the sensor begins to fail, the engine control unit may receive incorrect airflow data, causing rough running, poor fuel economy or reduced engine performance. Replacing the sensor restores correct air-fuel mixture control and ensures the engine operates smoothly.

Consider replacing the air mass flow sensor if you notice:
•   Check engine light related to airflow or fuel mixture
•   Rough idle or engine hesitation
•   Poor fuel economy
•   Engine running excessively rich or lean

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Alternator 14 Volt 90 Amp

The Porsche Alternator is a high-quality 14 Volt, 90 Amp charging system component designed for Porsche 928 models produced between 1978 and 1984. As a critical part of the vehicle's electrical system, the alternator generates electrical power while the engine is running and continuously recharges the battery to ensure reliable operation of all onboard systems.

The alternator supplies power to essential components including the ignition system, fuel injection, engine management systems, lighting, instrumentation, climate control and electrical accessories. Without sufficient charging output, the battery will gradually discharge, leading to electrical faults, poor starting performance and eventual vehicle breakdown.

Fastening Type: Single pivoted lever
Pulleys: without belt pulley
Info: with integrated regulator
Rotation Direction: Clockwise rotation
Connector / Clamp without connection for speed sensor
Voltage: 14v
Alternator Charge Current: 90 amp
manufacturer quality: MADE IN GERMANY

For owners of early Porsche 928 models, maintaining a healthy charging system is essential to preserve reliability, performance and the smooth operation expected from Porsche's luxury V8 grand tourer.

What Does an Alternator Do?

The alternator converts mechanical energy from the running engine into electrical energy. Driven by the engine belt system, it continuously generates power to operate the vehicle's electrical systems while simultaneously charging the battery.

The alternator is responsible for:

Charging the battery while driving Supplying power to vehicle electrical systems Maintaining correct system voltage Supporting ignition and fuel injection operation Ensuring reliable engine starting

A properly functioning alternator is essential for maintaining stable electrical performance throughout the vehicle.

Symptoms of Alternator Wear or Failure

Alternators operate under constant electrical and mechanical load and are exposed to heat, vibration and age-related wear. Over time, internal components such as bearings, brushes, voltage regulators and rectifiers can deteriorate.

Common symptoms of alternator failure include:

Battery warning light illuminated Flat or repeatedly discharged battery Slow engine cranking Hard starting Flickering or dim headlights Weak dashboard illumination Electrical accessories operating intermittently Low charging voltage Whining, grinding or bearing noises Burning electrical smell Engine stalling caused by low system voltage

In many cases, charging performance gradually deteriorates before complete alternator failure occurs.

Why Alternator Replacement Matters

A failing alternator can leave the battery unable to recharge, eventually resulting in complete loss of electrical power and vehicle breakdown.

Replacing a worn alternator helps:

Restore proper battery charging Prevent unexpected breakdowns Improve electrical system reliability Maintain stable charging voltage Extend battery life Protect sensitive electrical components Eliminate charging system warning lights Ensure dependable vehicle operation

For classic Porsche 928 models, maintaining correct charging voltage is especially important for protecting ageing electrical systems and ensuring long-term reliability.

Features & Benefits

• 14 Volt, 90 Amp output
• Provides reliable battery charging
• Maintains stable electrical system voltage
• Supports ignition and fuel injection systems
• Helps prevent battery discharge
• Durable construction for long service life
• Ideal for maintenance, repairs and restoration projects

Keep your Porsche 928 charging system operating at peak performance with this Alternator 

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

92860311401

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