Air cooling parts
Replacement rubber intake sleeve / connecting hose manufactured to original Porsche specifications. This direct-fit replacement restores airtight sealing between the air flow meter and intake manifold, preventing leaks and ensuring precise fuel metering for smooth, powerful performance.
Fits:
Porsche 964 C2 / C4 1989 - 1994
Porsche 964 Carrera RS
Porsche 993 C2 / C4 1994 - 1995
Porsche 993 Turbo 1994 - 1998
This product supersedes Porsche's old part numbers:
- 96411068601
- 96411068603
Diagram ref no 5.
Material: Heat- and oil-resistant rubber compound
Function: Seals air distributor to intake runners; prevents vacuum leaks
Position: Between intake plenum and cylinder head manifolds
Replacement Interval: During intake removal, rebuild, or when cracks are visible
Benefits: Restores proper airflow, stable idle, and factory performance consistency
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
96411068604
The product you are viewing cross references to these numbers
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) TURBO 1994-96

Fits:
Porsche 964 C2 / C4 / Turbo 1989-94
Porsche 993 C2 / C4 / C2S / C4S / Turbo 1995-98
Diagram ref no 25
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
96410605131
The product you are viewing cross references to these numbers
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
- Porsche 993 (911) TURBO 1994-96
- Porsche 993 (911) GT2 1994-97
- Porsche 993 (911) TURBO S 1994-97

The Porsche Alternator Belt Pulley Shim is a genuine OEM spacer washer used in the alternator belt pulley assembly. Designed to fine-tune pulley alignment, this 0.5 mm shim ensures the alternator belt runs true, preventing misalignment, premature wear, and belt noise.
Sold Each.
Fits:
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
What This Product Does:
- The shim adjusts the axial spacing (depth) of the alternator pulley relative to the housing or bearing so that the alternator belt alignment is correct.
- It ensures the pulley is neither too far in nor too far out, thereby avoiding misalignment with the belt path, which could cause wear, noise, or belt slip.
- Proper spacing is critical for belt tension, pulley alignment, and smooth operation of the alternator / drive belt.
- There is belt misalignment — the belt rides off center or rubs on pulley edges or guides.
- Unusual belt noise such as squealing or chirping, especially under load or at startup, which might indicate pulley or belt misalignment.
- Excessive belt or pulley wear — uneven wear on belt ribs or pulley surfaces.
- When installing a replacement alternator / pulley you find the original shim is missing, damaged, or of unknown thickness.
- You notice vibration or play in the alternator pulley assembly, possibly due to improper spacing.
Why Replacement Matters:
- Belt Misalignment – Without correct spacing, the alternator belt may track incorrectly, slip, or ride off the pulley edges.
- Premature Wear – Misaligned belts put stress on both the belt and pulley, causing them to wear out faster.
- Noise and Vibration – A missing or damaged shim often results in squealing, chirping, or vibration under load.
- Charging Issues – A poorly aligned belt can slip, reducing alternator efficiency and risking undercharging of the battery.
- Avoidable Damage – Replacing a small shim prevents more expensive damage to the alternator, pulleys, and belt system.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
96410626800
The product you are viewing cross references to these numbers
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93

Fit:
Porsche 911 1965-89
Porsche 911 (930) Turbo 1975-89
Porsche 964 Turbo 3.3L / Turbo 3.6L 1991-94
Porsche 914-6 1970-76
Diagram ref no 2
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
96410625120
The product you are viewing cross references to these numbers
- 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)
- Porsche 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
- Porsche 914 (1970-1976)
Fit:
Porsche 911 1965-89
Porsche 911 (930) Turbo 1975-89
Porsche 964 Turbo 3.3L / Turbo 3.6L 1991-94
Porsche 914-6 1970-76
Diagram ref no 2
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
96410625120
The product you are viewing cross references to these numbers
- 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)
- Porsche 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
- Porsche 914 (1970-1976)

Fits:
Porsche 964 Turbo 1989-94
Porsche 993 Turbo 1994-98
Old Porsche part number:
- 96410601521
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
96410601522
The product you are viewing cross references to these numbers
- Porsche 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
- Porsche 993 (911) TURBO 1994-96
- Porsche 993 (911) TURBO S 1994-97

Fits:
Porsche 964 C2 / C4 1989-94
Porsche 993 C2 / C4 / C2S / C4S 1994-98
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97

Fit:
Porsche 964 Carrera RS 1991-93
Porsche 993 Carrera RS 1995-96
Diagram ref no 9
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
96410601540
The product you are viewing cross references to these numbers
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
- Porsche 993 (911) RS 1994-97

Fits:
Porsche 964 1989-94
Porsche 993 1994-98
Click 'Zoom in' for large parts diagram.
Diagram ref no 19.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
93060304101
The product you are viewing cross references to these numbers
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
- Porsche 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) RS 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
- Porsche 993 (911) TURBO 1994-96
- Porsche 993 (911) GT2 1994-97
- Porsche 993 (911) TURBO S 1994-97
Fits:
Porsche 964 Carrera 2 / 4 - 1989 to 1994
Porsche 964 Carrera RS - 1992
Diagram ref no 6
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
96410601701
The product you are viewing cross references to these numbers
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93

Fits:
Porsche 964 Carrera 2 / 4 1989-94
Porsche 964 Carrera RS 1992
Diagram ref no 6
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
96410601701
The product you are viewing cross references to these numbers
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93

Fits:
Porsche 964 Carrera 2 / 4 1989-94
Porsche 964 Carrera RS 1992
Diagram ref no 5
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
96410666703
The product you are viewing cross references to these numbers
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93

Fits:
Porsche 964 Carrera RS 3.6L 1992
Porsche 993 Carrera RS 1995-96
Click 'zoom in' for large parts diagram.
Diagram ref no 25
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99310605180
The product you are viewing cross references to these numbers
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 993 (911) RS 1994-97


Fits:
Porsche 964 C2 / C4 / RS 1989-94
Porsche 993 1994-98
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) RS 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
- Porsche 993 (911) TURBO 1994-96
- Porsche 993 (911) GT2 1994-97
- Porsche 993 (911) TURBO S 1994-97


Fits:
Pre-vario ram cars only
Porsche 964 (1989 to 1994)
Porsche 993 Carrera RS Clubsport (1995 to 1996; with engine code M64.20)
Click 'Zoom in' for large parts diagram.
Diagram ref no 5
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
96410640302
The product you are viewing cross references to these numbers
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
- Porsche 993 (911) RS 1994-97

Fits:
Pre-vario ram cars only
Porsche 964 (1989 to 1994)
Porsche 993 Carrera RS Clubsport (1995 to 1996; with engine code M64.20)
Click 'Zoom in' for large parts diagram.
Diagram ref no 5
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
96410640302
The product you are viewing cross references to these numbers
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
- Porsche 993 (911) RS 1994-97
Air Cooling Parts – Engine Efficiency and Temperature Control for Porsche Vehicles
Air cooling parts are essential components designed to regulate engine temperature, ensuring your Porsche runs efficiently, safely, and at peak performance. These components manage airflow and heat dissipation within air-cooled engines, preventing overheating and maintaining consistent operating conditions.
At Design911, we offer a wide selection of genuine and high-quality air cooling parts for Porsche models including classic air-cooled 911s, 964, 993, and more. Our range includes fan assemblies, shrouds, ducts, pulleys, housings, and cooling tins, all precision-engineered for exact fitment and reliable thermal management. Every part is built to the same high standards as the original factory components, ensuring lasting performance and authenticity.
What Do Air Cooling Parts Do?
Air cooling components work together to keep the engine’s
operating temperature stable by directing airflow across critical areas. Key
functions include:
- Cooling
the engine cylinders and heads to prevent overheating.
- Regulating
airflow through fans, ducts, and shrouds.
- Maintaining
consistent engine performance under varying load and speed conditions.
- Supporting mechanical efficiency and preventing thermal stress on components.
For Porsche’s legendary air-cooled engines, proper airflow and cooling performance are vital to achieving both longevity and smooth, balanced operation.
Why Do Air Cooling Parts Fail?
Over time, air cooling components can degrade due to
exposure to heat, vibration, and environmental wear. Common failure causes
include:
- Cracked
or warped shrouds and ducts from thermal stress.
- Fan
damage or imbalance caused by corrosion or debris.
- Loose
pulleys or belts reducing airflow efficiency.
- Corroded
or missing fasteners and mounts leading to rattling or misalignment.
- Material fatigue from age or improper maintenance.
Symptoms of failure include higher-than-normal engine temperatures, noise from the cooling fan, or visible cracks and wear on housing parts.
Why Replace Faulty Air Cooling Parts?
A compromised cooling system can lead to overheating, reduced performance, or even engine failure. Replacing worn or damaged components ensures optimal air circulation and temperature regulation, protecting your engine’s reliability and value.
Benefits of replacement include:
- Restored and efficient airflow across engine components.
- Consistent operating temperatures and improved engine longevity.
- Prevention of costly overheating-related damage.
- Factory-spec fitment and manufacturer-quality materials.
All air cooling parts in this range are designed to meet or exceed exacting engineering standards, ensuring durability, precision, and confidence for both restoration projects and regular maintenance.