Air flap Genuine Porsche part 90121102822

Clamp for heater hose top & holder for heater cable.
Left or right side



Fits:
Porsche 911 1965-86
Porsche 911 Turbo 3.0L / 3.3L 1975-86

Click 'Zoom in' for large parts diagram.
Diagram ref no 2

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Related, superseded, cross reference or alternative numbers for comparison.

90121105

The product you are viewing cross references to these numbers

Exhaust racing tube without heating function. Ø 38 mm outside.
Replacing heat exchangers. Painted chrome steel.



Fits:
Porsche 911 T / E / S 2.0-2.4L 1964-73
Porsche 911 / S / CARRERA 2.7L 1974-76

Left or right side
Select below. Price is for each one

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Related, superseded, cross reference or alternative numbers for comparison.

9112209101

The product you are viewing cross references to these numbers

Heater flap box for cars fitted with standard or SSI heat exchangers. Stainless Steel. Not for G50
cars

Fits:
Porsche 911 Carrera, 3.2, 8/83-7/86
Porsche Carrera Sport, 3.2, 8/83-7/86
Porsche 911S (mech. inj.), 2.4, 8/71-7/73
Porsche 911SC/911 Carrera, 2.7-3.0, 8/75-7/83
Porsche 911SC/Turbo (930T), 3.3, 8/78-7/86
Porsche 911T/E/S (not mech. inj.), 2.0-2.4, 1/63-7/73
Porsche 911/911S/911 Carrera, 2.7, 8/73-7/75
Porsche 912 Export Model USA
Porsche 912 Model Europe

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Related, superseded, cross reference or alternative numbers for comparison.

90121100

The product you are viewing cross references to these numbers

Exhaust Racing Heat Exchanger without heating function, Ø45 mm outside. Fits 91122092212 directly with use of exhaust tube 91133092213. Parts no 91122091021 needed for use with standard exhaust. Stainless steel.



Fits:
Porsche 911 T/E/S (not mech. injection) 2.0-2.4L 01/1963-07/1973
Porsche 911 S 2.4L 08/1971-07/1973
Porsche 911 S (mech. injection) 2.4L 08/1971-07/1973
Porsche 911 S (mech. injection) 2.7L 08/1973-07/1975
Porsche 911/911 S/911 Carrera 2.7L 08/1973-07/1975

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Related, superseded, cross reference or alternative numbers for comparison.

16231019

The product you are viewing cross references to these numbers

Racing header set without heating function, with pipes to connect to standard exhaust with 2 inlets, Ø 45 mm OD outside. Stainless steel.
The 3 pipes from the engine are 42mm ID inside, and the pipes that connects are 47mm ID inside.



Fits:
Porsche 911 2.0L to 2.7L - 1965 to 1977

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Related, superseded, cross reference or alternative numbers for comparison.

1620101010

The product you are viewing cross references to these numbers

Exhaust heat exchangers. Porsche 914/6 2.0L 1970-73



Fits:
Porsche 914 6 cyl. 2.0L 11/1969-12/1973

Left or right side.
Select below please. Price is for each one.

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

16231043

The product you are viewing cross references to these numbers

DesignTek Porsche 911 header is made of stainless steel. These are a direct replacement for the heat exchangers on 1965-74, but it will also work on 1975-1989 911 by replacing the necessary hardware (e.g. muffler, oil lines). Our header is designed to increase the efficiency of the gas flow and thus to raise the horsepower of the engine. It is also made of stainless steel to improve durability, and the flanges are CNC machined to enhance stability. Our header is designed to be direct bolt-on for easy installation. This header set includes 1 pair of headers, gaskets, and bolts/nuts for installation. **

Fits:
Porsche 911 2.0/2.2/2.4/2.7/3.0L
Racing or Street RSR
Porsche 911R
Porsche 911RS

Specification
• Material: stainless steel
• Tube Diameter (OD): 1 1/2"
Features Highlights
• Direct bolt-on to increase horsepower
• Strong and durable
• Gaskets/bolts/nuts are included for easy installation

**Professional installation is recommended
**A break-in period of 500 miles is required after the installation

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

3606309111

The product you are viewing cross references to these numbers

Heater Flap Boxes In Stainless Steel (Not For G50 Cars)
SET OF 2
Upgrade the durability and reliability of your classic Porsche's heating system with these OE Match Heater Flap Boxes in Stainless Steel, manufactured as a direct replacement. Designed for models not equipped with the G50 gearbox, these heater flap boxes retain the original fit and function while offering the added corrosion resistance of stainless steel construction.

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 1984-1986 3.2L
• Porsche 911 1987-1989 3.2L G50
• Porsche 911 1975-1977 3.0L Turbo (930)
• Porsche 911 1978-1989 3.3L Turbo (930)  

Heater flap boxes regulate the flow of warm air from the heat exchangers into the cabin, providing effective heating and windscreen demisting. Original mild steel units are prone to corrosion from moisture, road debris, and repeated heat cycles, which can cause the flap mechanism to seize or the housing to deteriorate. These stainless steel OE Match replacements provide a long-lasting solution, making them ideal for both regular maintenance and high-quality restoration projects.  

What This Product Does:

• Control the flow of heated air from the heat exchangers.
• Direct warm air into the cabin when heating is selected.
• Divert airflow when cabin heat is not required.
• Support effective windscreen demisting and defrosting.
• Restore smooth operation of the heating control system.
• Provide improved corrosion resistance with stainless steel construction.
• Replace worn, corroded, or seized original heater flap boxes.

Symptoms Of Wear Or Failure:

• Poor or inconsistent cabin heating.
• Reduced airflow through the heating system.
• Heater remaining on or off regardless of control position.
• Seized or stiff heater flap mechanism.
• Corrosion or rust on the flap box housing.
• Air leaks around the heater flap assembly.
• Rattling or vibration from underneath the vehicle.
• Difficulty operating the heater controls.
• Visible holes or deterioration caused by corrosion.
• Damaged or missing heater flap boxes.

Why Replacement Matters:

• Faulty heater flap boxes reduce the efficiency of your Porsche's heating and ventilation system, affecting cabin comfort and limiting the ability to demist or defrost the windscreen. Corroded housings and seized flaps can also allow unwanted air leaks and prevent accurate temperature control.
• Replacing worn flap boxes restores proper airflow management and dependable heater operation while the stainless steel construction offers significantly greater resistance to corrosion than the original mild steel units. This helps extend service life, reduces future maintenance, and preserves the reliable performance and factory-style operation of the heating system, making these OE Match flap boxes an excellent upgrade for classic Porsche ownership and restoration.

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

90121100100

The product you are viewing cross references to these numbers

Set of 2 stainless steel heat exchangers for Porsche 911 (1965-1989) chassis fitted with the M64 3.6L engine from Porsche 964 and 993 models. This setup eliminates the side and center silencers, converting the rear silencer into a "two in, one out" system, reminiscent of early pre-impact bumper cars.

Fits:
Porsche 911 Chassis 1965-89 Fitted With M64 964/993 3.6L Engine

LONG LIFE

Made from AISI 321/EN4531 titanium-stabilised stainless steel, these heat exchangers are built for durability, with an expected lifespan of 20-30 years in high-salt environments and even longer in milder conditions.

HIGHER POWER OUTPUT
Designed to optimise exhaust flow, these headers improve power output, particularly in low and mid-RPM ranges, by reducing intake charge disturbances at valve overlap and enhancing exhaust gas extraction. SSI headers are a refined version of Porsche’s competition-proven six-cylinder header design.

CARBON MONOXIDE SAFE
Unlike other aftermarket options, SSI heat exchangers are engineered to prevent internal corrosion from engine acids, reducing the risk of carbon monoxide leaks. Constructed from high-quality AISI 304 stainless steel with seamless primary tubes, they eliminate weak weld points that could lead to cracks and leaks.


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

91133091936SSI

The product you are viewing cross references to these numbers