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Porsche > 911 & 912 (1965-1989) > 911 1987-1989 3.2L G50 > Gearbox / Transmission >

Flywheel / Torque

Flywheel / Torque

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DISPLAYING 1 to 7 (of 7 products)
Billet steel conversion flywheel. 911 G50 with 964/993 engine. Porsche 911 - 93010203303 - 9M3010223902
3
Billet steel conversion flywheel. 911 G50 with 964/993 engine. Porsche 911
9M3010223902
Product Information
Product Information
9m Flywheel conversion. 911 G50 with 964/993 engine. 
Used when fitting a 964 or 993 engine to a 3.2 Carrera with a G50.00 gearbox or a 911 turbo with G50.50 gearbox

Fits:

Porsche 911 3.2 Carrera - 1987 to 1989 (G50.00)
Porsche 911 turbo - 1989 (G50.50)

9m 911 G50 & G50-50 flywheel conversion to 964/993 - Used when fitting a 964 or 993 engine to a 3.2 Carrera with a G50.00 gearbox or a 911 turbo with G50.50 gearbox

9m Lightweight Sport Flywheel With 60-2 Tooth Timing Configuration for 964 /993  DME.

  • 20% reduction in rotating mass
  • Faster acceleration
  • No stalling issues
  • More power to the wheels
  • OEM pedal feel
  • CNC machined high carbon forged billet  steel material
  • Direct replacement
  • Less engine inertia
  • Better throttle response



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Related, superseded, cross reference or alternative numbers for comparison.

9M3010223902
93010203303

The product you are viewing cross references to these numbers
Flywheel spigot bearing. Porsche 911 / 924 / 944 / 968 / 997 turbo / 997 GT3 RS - 93110211100, 93110211102, 93110211102/1
3
Flywheel spigot bearing. Porsche 911 / 924 / 944 / 968 / 997 turbo / 997 GT3 RS
93110211102/1
Product Information
Product Information

Flywheel Spigot Bearing 

Ensure smooth clutch operation and precise gearbox input shaft alignment with this OE Match Flywheel Spigot Bearing, designed for selected Porsche 911, 924, 944, 968 and 997 GT3 RS models. Manufactured to original equipment specifications, this high-quality replacement bearing supports the gearbox input shaft within the flywheel or crankshaft, reducing friction and ensuring smooth clutch engagement.

Fits:

  • Porsche 911 1987-1989 3.2L G50
  • Porsche 911 1978-1989 3.3L Turbo (930)
  • 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 997 MK1 TURBO 2007-09
  • Porsche 997 MK1 GT3 RS 2007-09
  • Porsche 924 Turbo 2.0L 1979-81
  • Porsche 924 Turbo 2.0L 1982-84
  • 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
  • Porsche 944S2 3.0L 16V 1989-91
  • Porsche 944 Turbo 2.5L 8V 1985-88
  • Porsche 944 Turbo 2.5L 8V 1989-91
  • Porsche 944 Turbo S 2.5L 8V 1988
  • Porsche 968 3.0L 1992-94
  • Porsche 968 Sport 3.0L 1994-95
  • Porsche 968 CS 3.0L 1993-95
  • Porsche 968 Turbo S 3.0L 1993-94

Diagram ref no 3

Although compact, the spigot bearing is a critical drivetrain component. Replacing it during clutch servicing helps maintain precise transmission alignment, reduces gearbox wear and ensures reliable long-term operation.

What Does the Flywheel Spigot Bearing Do?

Also known as a pilot bearing, the flywheel spigot bearing supports the tip of the gearbox input shaft while allowing it to rotate independently of the engine when the clutch is disengaged.

Its primary functions include:

  • Supporting the gearbox input shaft.
  • Maintaining precise alignment between the engine and transmission.
  • Reducing friction during clutch operation.
  • Allowing smooth clutch disengagement.
  • Minimising wear on the gearbox input shaft.
  • Helping provide smooth gear changes and consistent clutch operation.

A properly functioning spigot bearing is essential for the smooth operation of the clutch and transmission.

Why Do Flywheel Spigot Bearings Fail?

The bearing is subjected to continuous rotational loads, clutch operation and heat throughout its service life. Common causes of failure include:

  • Normal bearing wear after high mileage.
  • Loss or deterioration of lubrication.
  • Dirt or clutch dust contamination.
  • Corrosion caused by moisture.
  • Excessive heat generated by clutch slip.
  • Wear caused by misalignment or heavy clutch use.

As the bearing wears, it may develop excessive play or roughness, placing additional stress on the clutch and gearbox.

When Should the Flywheel Spigot Bearing Be Replaced?

Replacement is recommended whenever:

  • A new clutch kit is installed.
  • The gearbox is removed.
  • A flywheel is replaced.
  • The bearing feels rough or noisy.
  • Excessive play is detected.
  • During engine or transmission rebuilds.

Because the bearing is inexpensive compared to the labour required to access it, Porsche specialists strongly recommend replacing it during every clutch replacement.



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

93110211102
93110211100
93110211102
93110211102

The product you are viewing cross references to these numbers
Flywheel. Porsche 911 1987-89 - 93010203303
1
Flywheel. Porsche 911 1987-89
Special Order item
93010203303
Product Information
Product Information
Clutch flywheel.

Fits:
Porsche 911 3.2L 1987-89 (G50 Gearbox)
Porsche 964 3.6L Carrera (G50 Gearbox)

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

93010203303
93010203303

The product you are viewing cross references to these numbers
Flywheel. Porsche 911 1987-89 - 313 09 632, 313 09 632 03 41, 93010203303, GT.011.007
2
Flywheel. Porsche 911 1987-89
93010203303/1
Product Information
Product Information
Flywheel.

Fits:
Porsche 911 3.2L 1987-89 (G50 Gearbox)
Porsche 964 3.6L Carrera (G50 Gearbox)

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

93010203303
313 09 632
313 09 632 03 41
93010203303
GT.011.007

The product you are viewing cross references to these numbers
Lightweight steel flywheel 240mm 9 Bolt. Porsche 911 1987-89 - 106402-12, 93010203303, 930102033BX
1
Lightweight steel flywheel 240mm 9 Bolt. Porsche 911 1987-89
106402-12
Product Information
Product Information
Lightweight Steel Flywheel.
240mm / 9 bolt with trigger

aasco

Fits:
Porsche 911 3.2L 1987-89 with G50 Gearbox

Features:
• Light-weight for improved performance and drastically reduced M.O.I. (Moment of Inertia)
• OEM clutches bolt on for easy installation
• High tolerance manufacturing to insure a perfect hassle free installation
• Designed for normal street use for every day performance enthusiasts
• Stepped dowel pins so they are held captive by the clutch cover
• Racing parts available for the professional
• Highest quality materials for the flywheel like treated steel and OEM quality starter ring gears
• CAD designed/ CNC machined in house for the ultimate in quality control
• One year limited warranty on production components

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

106402-12
106402-12
93010203303
930102033BX

The product you are viewing cross references to these numbers
Rear main oil seal - crank rear. Porsche 911 78-89 / 930 - 99911342641, 99911326440, 99911346140, 99911342640 - 21074, 569.120
2
Rear main oil seal - crank rear. Porsche 911 78-89 / 930
99911342641/1::1
Product Information
Product Information
Rear main oil seal - crank rear.
Fitting Position: Transmission End
Inner Diameter: 90 mm, Outer diameter: 110 mm, Width: 12 mm
Radial Shaft Seal Design.

Fits:
Porsche 911 3.0L 1978 - 1983
Porsche 911 3.2L 1984 - 1989
Porsche 930 Turbo 1975 - 1989

Diagram Ref No 33

The rear main oil seal fits at the rear of the crankshaft where it passes through the engine case. It helps retain engine oil inside the crankcase and prevents oil from leaking into the flywheel, clutch, or transmission bellhousing area.

Functions
•  Replaces the rear crankshaft oil seal
•  Helps seal the rear of the engine crankshaft
•  Helps prevent engine oil leaks from the bellhousing area
•  Protects the clutch and flywheel area from oil contamination
•  Supports correct crankcase oil retention
•  Replaces hardened, worn, split, leaking, or damaged original seals
•  OE Match replacement for Porsche 911 and 930 engine service.

Why Replace This Part?
Rear main oil seals are exposed to heat, crankshaft rotation, oil, pressure changes, and age-related wear. Over time, the seal can harden, shrink, crack, wear, or lose sealing ability. A failed rear main seal may cause oil leaks between the engine and gearbox, oil contamination on the clutch, burning oil smells, or visible oil dripping from the bellhousing area. Replacing the seal helps restore a clean, reliable crankshaft seal.

When to Replace This Part
•   Oil is leaking from between the engine and gearbox
•   Oil drips are visible from the bellhousing area
•   The clutch or flywheel is contaminated with oil
•   The engine or gearbox has been removed
•   The flywheel is being removed or replaced
•   The original seal is hardened, worn, split, or leaking
•   Preventative replacement is being carried out during clutch or engine service.

Where it fits on the car
This oil seal fits at the rear crankshaft position on Porsche 911 and 930 engines. It sits between the crankshaft and engine case, behind the flywheel area.

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

99911342641
99911342641
99911326440
99911346140
99911342640

The product you are viewing cross references to these numbers
Rear main oil seal - crank rear. Porsche 911 78-89 / 930 - 99911342641, 99911326440, 99911346140, 99911342640, 99911342642 - 311.898, 21074, 569.120
2
Rear main oil seal - crank rear. Porsche 911 78-89 / 930
Special Order item
99911342642
Product Information
Product Information
Oil seal - crank rear
Fitting Position: Transmission End,
Inner Diameter: 90 mm,
Outer diameter: 110 mm,
Width: 12 mm, Radial Shaft Seal Design.

Fits:
Porsche 911 3.0L 1978 - 1983
Porsche 911 3.2L 1984 - 1989
Porsche 930 Turbo 1975 - 1989

Diagram Ref No 33

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

99911342642
99911342641
99911326440
99911346140
99911342640
99911342642

The product you are viewing cross references to these numbers
DISPLAYING 1 to 7 (of 7 products)
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About Flywheel / Torque

Porsche Flywheels & Torque Converters | Smooth Power Transfer & Engine Balance

Flywheels and torque converters are vital components in your Porsche’s drivetrain, ensuring smooth power transfer from the engine to the transmission. The flywheel provides rotational balance and stores kinetic energy for manual gear changes, while the torque converter in automatic models performs a similar role — transferring engine torque hydraulically for seamless acceleration.

At Design911, we supply precision-engineered flywheels and torque converters designed to meet or exceed original performance specifications. Each component is manufactured from high-grade materials, ensuring strength, balance, and reliability under all driving conditions. Whether you’re restoring a classic 911 or maintaining a modern PDK-equipped Porsche, our range provides the quality and performance your drivetrain demands.

What Do Flywheels & Torque Converters Do?

Both components play critical roles in the performance and drivability of your Porsche, acting as torque-transfer systems between the engine and gearbox.

Flywheels (Manual Transmissions):
Store rotational energy to maintain engine smoothness. Provide a friction surface for clutch engagement. Aid in gear transitions by balancing engine speed and torque.

Torque Converters (Automatic Transmissions):
Transfer torque through fluid dynamics between engine and gearbox. Enable smooth gear shifting without clutch operation. Multiply torque for efficient acceleration and smoother driving.

Together, they ensure seamless operation, smooth starts, and optimal power delivery from engine to transmission.

Why Do Flywheels & Torque Converters Fail or Wear Out?

Over time, both flywheels and torque converters experience wear due to high rotational forces, friction, and heat cycles.

Common Causes of Failure Include:

  • Heat damage or warping from clutch slippage (flywheels).
  • Cracked or worn ring gear teeth affecting starter engagement.
  • Fluid contamination or internal seal leaks (torque converters).
  • Bearing wear leading to vibration or imbalance.
  • Excessive torque or misalignment from modified engines.

Symptoms of failure may include clutch chatter, transmission shudder, vibration during acceleration, or slipping during gear changes. Ignoring these signs can lead to further drivetrain damage.

Why Replace your Flywheel or Torque Converter?

Replacing worn flywheels or torque converters restores smooth torque delivery, reduces vibration, and ensures reliable clutch or transmission performance. Upgraded lightweight flywheels improve throttle response, while performance torque converters enhance acceleration and drivability.

Key Benefits:

  • Restores smooth engine-to-transmission power delivery.
  • Eliminates vibration, slippage, and engagement issues.
  • Improves clutch or automatic transmission performance.
  • Balances rotational mass for smoother idling and shifting.
  • Available in lightweight or performance designs for tuned Porsches.
  • Ideal for clutch replacement, transmission rebuilds, or performance upgrades.

It’s strongly recommended to replace the flywheel or torque converter during any major clutch or gearbox service for long-term reliability and balanced performance.

Highlights

  • Premium Porsche flywheels and torque converters.
  • Precision-balanced for smooth, vibration-free operation.
  • Manufactured from high-strength, heat-treated materials.
  • Available for manual, automatic, and PDK Porsche models.
  • Enhances drivability, acceleration, and transmission longevity.
  • Essential for gearbox rebuilds, clutch services, and performance tuning.

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