Flywheel / Torque

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Related, superseded, cross reference or alternative numbers for comparison.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

The product you are viewing cross references to these numbers

Flywheel pilot bearing.



Fits:
Porsche 911 turbo 3.3Lltr - 1980 to 1988
930.66 / 930.68

Click 'Zoom in' for large parts diagram.
Diagram ref no. 4

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93010204200

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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
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93110211102

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Flywheel spigot bearing.
Clutch pilot bearing supports and stabilises the manual transmission input shaft at the rear of the crankshaft/flywheel interface.

Fits:
Porsche 911 TURBO 3.3L 1984 - 1988
* Engine type: 930.66 / 930.68

Diagram ref no. 3

The clutch pilot bearing serves a critical alignment role between the engine and the manual transmission. When the clutch is disengaged, it helps guide the transmission input shaft, allowing it to remain centered in the crankshaft or flywheel as it spins. This ensures smooth clutch engagement and disengagement, and it significantly reduces wear on the transmission input shaft and splines.

The clutch pilot bearing operates in a high-stress environment at the heart of the drivetrain. Over time and mileage, the bearing can wear out, leading to symptoms like:
• Grinding or whining noises when the clutch is pressed
• Difficulty shifting gears, especially into first or reverse
• Vibrations from the clutch pedal or drivetrain
•  In severe cases, the transmission may pop out of gear or sustain further damage.

Replacing bearing restores proper alignment between the engine and transmission, reduces drivetrain wear, and improves overall shifting smoothness and reliability.

Replace the clutch pilot bearing if:
• You are replacing the clutch assembly
•  You hear noise when engaging/disengaging the clutch
•  You experience difficult shifting or input-shaft vibration
•  The bearing shows signs of wear or looseness during inspection

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Related, superseded, cross reference or alternative numbers for comparison.

93010204200

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Flywheel.
The OE Match Flywheel is a high-quality replacement drivetrain component designed to transfer engine power smoothly to the clutch assembly and transmission while maintaining optimal engine balance and drivability. Manufactured to OE specifications for fit, weight distribution, balance and durability, this flywheel provides the critical interface between the engine crankshaft and clutch system.  

Fits:

Precision-machined from high-grade materials, the flywheel stores rotational energy generated by the engine and helps deliver smooth, consistent power to the drivetrain. It also provides the friction surface required for clutch engagement, making it an essential component for reliable power transfer, smooth gear changes and overall vehicle performance.  

What This Product Does:

• Transfers engine torque to the clutch and transmission.
• Provides the clutch friction surface for engagement and disengagement.
• Stores rotational energy to smooth engine operation.
• Helps maintain stable idle characteristics.
• Reduces drivetrain vibration and engine pulsations.
• Supports smooth gear changes and clutch performance.
• Contributes to efficient power delivery and drivability.
• Maintains correct balance within the engine and drivetrain assembly.

Symptoms Of Wear Or Failure:

• Clutch judder or shudder during take-off.
• Excessive drivetrain vibration.
• Uneven or inconsistent clutch engagement.
• Difficulty achieving smooth gear changes.
• Scoring, cracking or heat spots on the flywheel surface.
• Premature clutch wear.Burning clutch odours.
• Rattling or knocking noises from the bellhousing area.
• Excessive clutch slippage under load.
• Reduced overall driving comfort and performance.

Why Replacement Matters:

• The flywheel is subjected to significant mechanical loads, heat cycles and friction generated by clutch operation. Over time, the clutch contact surface can become worn, warped or heat-damaged, affecting clutch engagement and overall drivetrain performance.
• A damaged flywheel can cause vibration, poor clutch operation and accelerated wear of the clutch disc and pressure plate. Continuing to operate with a worn flywheel may compromise the performance of new clutch components and increase the likelihood of more extensive transmission and drivetrain repairs.
• Replacing a worn or damaged flywheel restores smooth power transfer, improves clutch engagement and helps maximise the lifespan of associated clutch components. An OE Match replacement provides factory-style fitment, precision balancing and durable construction, ensuring reliable performance and preserving the driving characteristics expected from your Porsche.

Related reference numbers
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93010221300

The product you are viewing cross references to these numbers

Flywheel. Porsche 930 1988-89

Fits:
Porsche 930 Turbo 3.3L 1988-89

Clutch flywheel.



Fits:
Porsche 930 Turbo 1978-79

Related reference numbers
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93010220201

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Lightweight billet aluminium flywheel. 



Fits:
Porsche 911 turbo 3.0ltr - 1975 to 1977
Porsche 911 turbo 3.3ltr - 1978 - to 1988

“Tuned” Billet Flywheels
Manufactured from only the highest quality steel and aluminum they are the only flywheels on the market manufactured to a .001 machine tolerance. This guarantees a flat seating surface for the clutch and smooth rotational qualities for perfect balance and extended engine life.

Machined friction plate is bolted in place so can be replaced if needed

SPEC billet flywheels are manufactured and developed for specific driving environments and recommended based on how each car reacts to changes in rotating mass.

Please Note
Images may be a representation and may not reflect the actual product.

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93010220151

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Lightweight Steel Flywheel.
240mm 9 bolt big bore



Fits:
Porsche 911 3.3L Turbo (935) 1980-88

Porsche equivalent number: 93010221300

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
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106407-12

The product you are viewing cross references to these numbers

Lightweight Flywheel.
240mm / 9 bolt / 8lbs / small bore



Fits:
Porsche 911 TURBO 3.3L 1978-79

Porsche equivalent number: 93010220201

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.

106405-12

The product you are viewing cross references to these numbers

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
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99911342641

The product you are viewing cross references to these numbers

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
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99911342642

The product you are viewing cross references to these numbers

Spigot bearing.


Fits:
Porsche 911 (930) Turbo 1975-79

Click 'Zoom n' for large pars diagram.
Diagram ref no 4

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93010202500

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