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Brake Master Cylinder

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DISPLAYING 1 to 11 (of 11 products)
95002500
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Brake fluid DOT 4 20Ltr Textar


textar

Brake fluid is one of the most important fluids in a car as without it, stopping the vehicle safely would be impossible. The Brake fluid transmits the force exerted by the driver on the brake pedal onto the wheel brake. 
To ensure perfect operation of the brakes, the brake fluid must be changed regularly during inspection or maintenance and tested with the correct brake fluid tester.

Brake fluid should be changed every two years. 

The higher the DOT class, the higher the boiling temperature and wet boiling point. Higher DOT classes tend to allow longer maintenance intervals. The DOT standards are based on the American FMVSS-116 standard of the Department of Transportation (DOT).

Boiling Point and Viscosity

Dry Boiling Point - describes the property of the sealed new brake fluid. In this state, the brake fluid is almost anhydrous (substance containing no water). The dry boiling point is usually between 240 and 280°C.

Wet Boiling Point
 - determines the property of the brake fluid at the end of its life cycle, at a water content of 3.5% the fluid should be replaced. This defined wet boiling point must not be undercut.

Viscosity - describes the flow rate of the brake fluid. The lower the viscosity, the faster the brake fluid flows through the brake system, and the faster the brake signals are transmitted. 

Important Notes
• Brake fluid is poisonous and a hazardous waste.
• Be careful when changing. The fluid weakens paints and plastics.
• It must not come into contact with eyes or skin. Always rinse spilled liquid with water.
• Do not pour the liquid into drinking water or mix with used oil.
• The colour of the brake fluid reveals nothing about its quality.
• Brake fluid should be stored in its original packaging and in a dry, cool and well-ventilated place.



Find out about Textar product verification here
L040
Product Information
Product Information
Brake discs, calipers, pads and brake master cylinders are the four cardinal points of each brake system; however, they are likely to be useless without the core of the entire system, the brake fluid. This component is so neglected as to be generally controlled in a summary fashion, with topping instead of a more appropriate replacement, at the change frequency recommended by the manufacturer.
brembo


DOT 4
Having an extremely high boiling point and lower viscosity than required, it meets and greatly exceeds regulatory standards. Also suitable for vehicles with ABS.

Vapour Lock formation
This sort of habit leaves room for the Vapour Lock, the formation of vapour bubbles due to boiling of the brake fluid that replace the normal fluid and are compressed, thereby sending the brake pedal to its fill stoke (spongy pedal). The origin is incident in the porosity of the tubes that make up the braking circuit, which in time draw moisture into the fluid, drastically reducing the boiling point. The result is a reduced braking efficiency.

Brembo Premium Brake Fluid
Brembo Premium brake fluids have a higher boiling point that exceeds the standard, thus offering superior resistance to the Vapour Lock and ensuring braking efficiency even at low temperatures. With high anti-corrosion properties and resistance to oxidation, Brembo brake fluid also allows for long-term unaltered chemical/physical characteristics of the fluid in operating circuit; therefore, preserving its integrity.



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

L040
00004320209
00004320366
00004321082
00004330552

The product you are viewing cross references to these numbers
95006
Product Information
Product Information

Brake fluid DOT 4 LV (Low Viscosity) Textar.

textar

Textar DOT 4 LV (Low Viscosity) is especially recommended for use in hydraulic brake and clutch systems of vehicles fitted with ESP, ABS and ASR with a high boiling point and outstanding performance at very low temperatures.

DOT 4 LV (Low Viscosity)
Dry Boiling Point ≥ 260° C 
Wet Boiling Point ≥ 165° C 
Viscosity at -40C < 750 mm2 /s

Brake fluid is one of the most important fluids in a car as without it, stopping the vehicle safely would be impossible. The Brake fluid transmits the force exerted by the driver on the brake pedal onto the wheel brake. 
To ensure perfect operation of the brakes, the brake fluid must be changed regularly during inspection or maintenance and tested with the correct brake fluid tester.

Brake fluid should be changed every two years. 

The higher the DOT class, the higher the boiling temperature and wet boiling point. Higher DOT classes tend to allow longer maintenance intervals. The DOT standards are based on the American FMVSS-116 standard of the Department of Transportation (DOT).

Boiling Point and Viscosity

Dry Boiling Point - describes the property of the sealed new brake fluid. In this state, the brake fluid is almost anhydrous (substance containing no water). The dry boiling point is usually between 240 and 280°C.

Wet Boiling Point - determines the property of the brake fluid at the end of its life cycle, at a water content of 3.5% the fluid should be replaced. This defined wet boiling point must not be undercut. <

Viscosity - describes the flow rate of the brake fluid. The lower the viscosity, the faster the brake fluid flows through the brake system, and the faster the brake signals are transmitted. 

Important Notes

• Brake fluid is poisonous and a hazardous waste.
• Be careful when changing. The fluid weakens paints and plastics.
• It must not come into contact with eyes or skin. Always rinse spilled liquid with water.
• Do not pour the liquid into drinking water or mix with used oil.
• The colour of the brake fluid reveals nothing about its quality.
• Brake fluid should be stored in its original packaging and in a dry, cool and well-ventilated place.



Find out about Textar product verification here

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

95006
00004330552
00004320366
00004321082
00004320209

The product you are viewing cross references to these numbers
95002
Product Information
Product Information
Brake fluid DOT 4 

textar

Brake fluid is one of the most important fluids in a car as without it, stopping the vehicle safely would be impossible. The Brake fluid transmits the force exerted by the driver on the brake pedal onto the wheel brake. 

To ensure perfect operation of the brakes, the brake fluid must be changed regularly during inspection or maintenance and tested with the correct brake fluid tester.

Brake fluid should be changed every two years. 

The higher the DOT class, the higher the boiling temperature and wet boiling point. Higher DOT classes tend to allow longer maintenance intervals. The DOT standards are based on the American FMVSS-116 standard of the Department of Transportation (DOT).

Boiling Point and Viscosity

Dry Boiling Point - describes the property of the sealed new brake fluid. In this state, the brake fluid is almost anhydrous (substance containing no water). The dry boiling point is usually between 240 and 280°C.

Wet Boiling Point - determines the property of the brake fluid at the end of its life cycle, at a water content of 3.5% the fluid should be replaced. This defined wet boiling point must not be undercut. 

Viscosity - describes the flow rate of the brake fluid. The lower the viscosity, the faster the brake fluid flows through the brake system, and the faster the brake signals are transmitted. 

Important Notes
• Brake fluid is poisonous and a hazardous waste.
• Be careful when changing. The fluid weakens paints and plastics.
• It must not come into contact with eyes or skin. Always rinse spilled liquid with water.
• Do not pour the liquid into drinking water or mix with used oil.
• The colour of the brake fluid reveals nothing about its quality.
• Brake fluid should be stored in its original packaging and in a dry, cool and well-ventilated place.

Find out about Textar product verification here

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

95002
00004430501
00004321082
00004330552
00004320366
00004320209

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Special Order item
94435501101
Product Information
Product Information
Brake master cylinder. 
This Brake Master Cylinder is a Genuine Porsche Original Equipment (OE) hydraulic braking component, manufactured to Porsche’s exact factory specifications. It is the original master cylinder used in selected Porsche 924 and 944 models equipped with the ATE braking system.

Fits:
Porsche 924 GT 1980 - 1985
Porsche 924S 1986 - 1988 RHD Cars
Porsche 944 1982 - 1985 Cars with ATE brand cylinder
Porsche 944 / 944 Turbo 1985 - 1986 RHD Cars

Diagram ref no 1

The master cylinder generates and regulates hydraulic pressure when the brake pedal is applied, distributing brake fluid to the front and rear circuits. It ensures consistent brake response, predictable pedal feel, and reliable stopping performance under all driving conditions.

A worn or failing master cylinder can cause loss of hydraulic pressure, poor pedal feel, or brake fluid leakage - all of which compromise safety. Replacing it with a Genuine Porsche OE unit restores factory braking performance, system integrity, and long-term reliability while preserving vehicle originality.

When to replace:
Brake pedal feels soft, spongy, or inconsistent
 Brake fluid leaks at the master cylinder
 Internal seal wear causing pressure loss
 Uneven or reduced braking performance
 During full brake system refurbishment or restoration

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

94435501101
94435501101

The product you are viewing cross references to these numbers
94435501101/1
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Product Information
Brake master cylinder
OE Match replacement brake hydraulic unit designed for direct fitment into the factory braking system without any modification. It converts mechanical force from the brake pedal into hydraulic pressure that actuates the brake calipers and wheel cylinders.

Fits:
Porsche 924 GT 1980 - 1985
Porsche 924S 1986 - 1988 RHD Cars
Porsche 944 1982 - 1985 Cars with ATE brand cylinder
Porsche 944 / 944 Turbo 1985 - 1986 RHD Cars

Diagram ref no 1

The master cylinder generates hydraulic pressure whenever the brake pedal is applied, initiating fluid movement through the brake lines to engage the front and rear brakes. By maintaining proper pressure and fluid control, it supports predictable stopping power and consistent brake pedal feel.

A worn or failing master cylinder can lead to poor brake feel, loss of pedal pressure, or uneven braking performance - all of which compromise safety. Replacing it with an OE Match unit restores reliable brake response and helps preserve the integrity of your Porsche’s braking system.

When to replace:
  Brake pedal feels spongy or soft
  Fluid leakage around the master cylinder
  Internal seal failure reducing hydraulic pressure
  Brake performance feels inconsistent or degraded
  Master cylinder age exceeds typical service life

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

94435501101
94435501101

The product you are viewing cross references to these numbers
Special Order item
94435501100
Product Information
Product Information
Brake Master Cylinder
porsche

Fits:
Porsche 924S 1986-88 LHD Cars
Porsche 944 1982-85 Cars with GIRLING brand cylinders
Porsche 944 1985-86 LHD Cars without ABS

Click 'Zoom in' for large parts diagram.
Diagram ref no 1

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

94435501100
94435501100

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15EC7F
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Product Information

Molub-Alloy Paste White T – High Performance Assembly & Anti-Fretting Paste

Molub-Alloy Paste White T is a premium high-performance assembly paste designed to provide exceptional protection against fretting corrosion, stick-slip, wear, and seizure in demanding automotive, industrial, and workshop applications.

This white assembly paste applies cleanly and appears almost colourless when spread as a thin layer, making it ideal for precision assembly work where cleanliness and protection are equally important.

Formulated for universal assembly and thin-film lubrication applications, Molub-Alloy Paste White T helps simplify component assembly and future disassembly while protecting contact surfaces against corrosion, vibration-related wear, and moisture ingress.

Its advanced formulation provides excellent resistance to both hot and cold water while delivering long-lasting corrosion protection under harsh operating conditions.

Particularly effective in applications exposed to vibration and frictional movement, the paste helps prevent fretting corrosion and reduces stick-slip behaviour, making it ideal for hydraulic cylinders, open lubrication points, threaded assemblies, sliding surfaces, and mechanical components subject to oscillating movement.

The product also helps eliminate squeaking noises and improves smooth operation in moving assemblies exposed to high loads and thermal stress.

Suitable for temperatures ranging from -30°C to +250°C, Molub-Alloy Paste White T delivers reliable lubrication and anti-corrosion performance across a wide range of workshop, automotive, and engineering environments.

Key Features

• High-performance white assembly paste
• Prevents fretting corrosion and surface wear
• Clean application with almost colourless thin-film appearance
• Helps simplify assembly and future disassembly
• Excellent anti-seize and separating properties
• Resistant to hot and cold water
• Reduces stick-slip and frictional vibration
• Helps eliminate squeaking noises
• Provides long-lasting corrosion protection
• Suitable for hydraulic cylinders and moving assemblies
• Wide operating temperature range from -30°C to +250°C
• Suitable for automotive, engineering, and industrial applications

Applications

Molub-Alloy Paste White T is ideal for:

• Assembly lubrication
• Anti-fretting protection
• Threaded fasteners and fittings
• Hydraulic cylinders
• Sliding and contact surfaces
• Open lubrication points
• Components exposed to vibration
• Mechanical assemblies requiring anti-seize protection
• Automotive workshop applications
• Industrial machinery and engineering assemblies

Why Use Molub-Alloy Paste White T?

Mechanical components exposed to vibration, friction, heat, and moisture can suffer from fretting corrosion, seizure, stick-slip, and accelerated wear.

Molub-Alloy Paste White T helps protect components by:
• Reducing friction between contact surfaces
• Preventing corrosion and seizure
• Improving assembly and removal
• Minimising vibration-induced wear
• Protecting against moisture and contamination

This makes it ideal for long-term component protection and reliable assembly work.

Temperature Performance

Designed for demanding operating conditions, Molub-Alloy Paste White T remains effective across a wide temperature range:

• Operating temperature: -30°C to +250°C
• Suitable for hot and cold operating environments
• Maintains lubrication and protection under thermal load

Clean & Professional Assembly Solution

Unlike darker anti-seize compounds, this white assembly paste offers a cleaner, more professional appearance during application and servicing.

Benefits include:
• Cleaner working environment
• Reduced visible residue
• Easier inspection during assembly
• Professional workshop finish

GTEUK198L2
Product Information
Product Information
Halo GT Advanced DOT 4 Racing Brake Fluid
600ml aluminium bottle

Halo GT is the latest formulation with a DOT 4 base suitable for the demands of motorsport (such as low compressibility and low viscosity). It has a dry boiling point of 336 degrees Celsius which is higher than the Brembo HT64. Whilst withstanding the demands of motorsport, Halo GT is suitable for track day use.

Brake Later. Release Faster. Accelerate earlier. Every Lap.

Halo GT is the ultimate DOT 4 racing brake fluid, fully compliant and optimized for the latest racing ABS systems. Engineered for ultra-fast response, thermal stability, and consistent pedal feel under the most demanding race conditions.

FEATURES

01 | Derived from P1 Proven under extreme conditions. Built on Halo P1 chemistry, developed for the highest demands of motorsport.

02 | Designed for GT racing The ultimate in DOT 4 racing brake fluid, fully compliant and optimized for use with the latest racing ABS systems.

03 | Ultra low viscosity Faster system response for immediate feedback and precise control.

04 | Fade Resistant Technology™ Performance that lasts. Maintains consistent pedal feel under repeated heat cycles with minimal fade as temperatures rise.

05 | Corner focused Control where it matters most. Optimised for braking zones, release precision, and clean transition back to throttle.


Performance benefits


Sharper response. Better control. Faster exits from start to finish.
•  Faster hydraulic response under load
•  Greater stability through repeated braking cycles
•  Quicker piston release for reduced drag
•  More precise brake modulation
•  Reduced thermal stress in extreme conditions
  Earlier throttle application on corner exit

Speed of Response.
Speed on Track. Modern Braking Systems demand instant response. Halo GT’s ultra-low viscosity allows the brake system to respond faster, improving communication between driver and car.
Faster pressure build-up. Cleaner release. Greater control at the limit.
Brake later. Release faster. Accelerate earlier.

Most races are won in the corner.
Anyone can be fast on the straight. But cornering takes skill. Performance is defined under braking, through release, and on exit. Halo GT is engineered for these moments. Giving drivers the confidence to brake faster, carry speed through the corner, and accelerate earlier. And continue to do that consistently, lap after lap.

For GT drivers who understand Performance.
Not for Everyone. Built for those who demand more.
Also suitable for Semi-Pro, Club Racing and Trackday performance drivers.

Technical Specification.

  336°C dry boiling point
  Ultra-low viscosity of 1350 cSt

Designed to maintain consistent performance under heat and repeated load, with full data available for detailed evaluation.



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

GTEUK198L2
00004320209
00004320366
00004321082
00004330552

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Special Order item
95535592100
Product Information
Product Information
Rubber Seal.

porsche

Fits:
Porsche 911 / 911S / Carrera 3.0 1977>>
Porsche 930 Turbo 1977>>
Porsche 924 1976-85
Porsche 924S 1986-88
Porsche 928 1978-95
Porsche 944 1982-90
Porsche 968 1992-95

Click 'zoom in' for large parts diagram.
Diagram ref no 22.

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

95535592100
91135592100
95535592100

The product you are viewing cross references to these numbers
Special Order item
91135592200
Product Information
Product Information
Pipe sealing grommet brake master cylinder. 
Sold each - 2 required per car

porsche

Fits:

Porsche 911 - 1974 to 1989
Porsche 911 turbo - 1975 to 1989
Porsche 964 Carrera 4 / turbo - 1989 to 1994
Porsche 924 turbo - 1979 to 1984
Porsche 924S - 1986 to 1988
Porsche 944 - 1982 to 1991
Porsche 968 - 1992 to 1995
Porsche 928 - 1978 to 1995

Click 'Zoom in' for large parts diagram.
Diagram ref no 20




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91135592200
91135592200

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DISPLAYING 1 to 11 (of 11 products)
About Brake Master Cylinder

Porsche Brake Master Cylinders | Design911 Precision Replacement Parts for Hydraulic Performance & Safety

The brake master cylinder is the heart of your Porsche’s braking system, converting pedal pressure into hydraulic force that engages the brake calipers. It ensures consistent, balanced braking across all wheels — a key factor in maintaining Porsche’s renowned control and stopping performance. When the master cylinder begins to fail, it can cause pressure loss, spongy pedals, or brake fade, making timely replacement essential for safety and precision.

At Design911, we stock a complete range of brake master cylinders, expertly engineered for exact fitment, consistent pressure delivery, and long-term durability. Each unit is crafted from high-quality materials to withstand intense hydraulic pressures and thermal cycling. Whether for road use, motorsport preparation, or classic restoration, our replacement master cylinders restore the precision and performance your Porsche was built to deliver.

What Does a Brake Master Cylinder Do?

The master cylinder plays a critical role in the hydraulic braking system, converting the mechanical pressure from your foot into fluid pressure distributed to each caliper.

Core Functions:
• Converts pedal movement into hydraulic pressure.
• Ensures even brake force distribution across all wheels.
• Maintains consistent pedal feel and braking response.
• Supports ABS and traction control systems.
• Provides safe, reliable braking performance in all conditions.

Without a properly functioning master cylinder, your Porsche’s braking system cannot maintain hydraulic balance or stopping efficiency.

Why Do Brake Master Cylinders Fail or Degrade?

Brake master cylinders endure constant hydraulic pressure and exposure to brake fluid — conditions that can lead to internal wear, leaks, or contamination over time.

Common Causes of Failure Include:
• Worn internal seals leading to pressure loss or leaks.
• Corrosion caused by moisture-contaminated brake fluid.
• Scored or pitted cylinder bores reducing seal integrity.
• Air ingress into the hydraulic system.
• Age-related degradation of rubber components.

When a master cylinder fails, it can cause reduced braking efficiency, fluid leaks, or an unresponsive pedal — all of which compromise safety and control.

Why Replace or Upgrade Your Porsche Brake Master Cylinder?

Replacing a worn or leaking master cylinder restores full hydraulic pressure and ensures reliable braking response. Design911’s precision-engineered master cylinders deliver performance and durability that meet or exceed Porsche standards.

Key Benefits:
• Restores safe and consistent braking performance.
• Prevents fluid leaks and loss of hydraulic pressure.
• Maintains proper brake balance across all wheels.
• Constructed from corrosion-resistant materials for longevity.
• Direct-fit replacements for easy installation.
• Suitable for classic and modern Porsche models.

Design911’s Porsche brake master cylinders offer exceptional reliability and performance — ensuring your Porsche stops with the same confidence and precision as it accelerates.

Highlights

• Premium Porsche brake master cylinders for performance and restoration.
• Precision-machined for superior hydraulic control.
• Resistant to corrosion, heat, and fluid breakdown.
• Ensures firm pedal feel and consistent braking response.
• Compatible with both road and track applications.
• Designed for easy installation and long service life.

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