Flywheel / Torque

Dual-mass flywheel
This original Porsche flywheel is designed for the high-performance 4.0L GT3 manual drivetrain, helping smooth engine torque delivery, reduce drivetrain vibration and support correct clutch operation.

Fits:
6-speed GT sports manual transmission (option code: 486)
Porsche 991 4.0L GT3 / GT3 RS 2017 - 2020
 * engine code: DGGA, DGGB

Diagram ref no 16

What This Part Does / Functions:
•  Connects the engine crankshaft to the clutch and gearbox assembly
•  Helps smooth engine torque pulses before they reach the transmission
•  Reduces drivetrain vibration, noise and harshness
•  Supports smooth clutch engagement and take-up
•  Helps protect gearbox and driveline components from shock load
•  Works with the manual clutch system to transfer engine power
•  Replaces a worn, noisy, heat-damaged or failed original flywheel

Why Replace This Part?
A dual-mass flywheel is a wear-sensitive drivetrain component. It is exposed to clutch heat, high engine speed, torque load, vibration and repeated clutch engagement. Over time, the internal damping mechanism can wear, the friction surface can become heat damaged, or the flywheel can develop excessive rotational play. A worn flywheel may cause clutch judder, rattling, vibration, poor clutch engagement or drivetrain harshness.

Replacing it with a Genuine Porsche dual-mass flywheel helps restore smooth clutch operation and factory Porsche drivability.

Common Symptoms of a Worn Dual-Mass Flywheel
•   Clutch judder during take-up
•   Rattling noise from the bellhousing area
•   Vibration at idle or when pulling away
•   Harsh or uneven clutch engagement
•   Excessive rotational play in the flywheel
•   Gearbox vibration or driveline shudder
•   Heat spots, scoring or cracking on the friction surface
•   Noise when switching the engine off
•   Wear found during clutch replacement.

When to Replace This Part
•   During clutch replacement if the flywheel shows wear
•   If the flywheel has excessive rotational or axial play
•   If the friction surface is heat damaged, cracked or scored
•   If clutch judder or drivetrain vibration is traced to the flywheel
•   If the flywheel is noisy or the internal damping mechanism has failed
•   During gearbox removal where flywheel condition is poor

Where It Fits on the Car
 This flywheel fits between the engine crankshaft and the manual clutch / gearbox assembly. It forms part of the drivetrain connection between the 4.0L GT3 engine and the 6-speed GT sports manual transmission.

Correct installation requires the correct clutch components, correct fasteners, Porsche workshop torque settings and proper inspection of the clutch release system.

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

9P1105262D

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Dual-mass flywheel
High-quality LuK dual-mass flywheel for the Porsche 911 Type 991.2 GT3 4.0L equipped with the 6-speed GT sports manual transmission.

Fits:
6-speed GT sports manual transmission (option code: 486)
Porsche 991 4.0L GT3 / GT3 RS 2017 - 2020
 * engine code: DGGA, DGGB

Diagram ref no 16

The LuK 415097010 cross-references Porsche OE 9P1105262D and is designed as a stock-replacement dual-mass flywheel for the high-revving naturally aspirated GT3 drivetrain.

Positioned between the engine crankshaft and clutch assembly, the dual-mass flywheel performs an important role in transferring engine torque while controlling torsional vibration before it reaches the gearbox.

This helps retain the smooth clutch engagement, controlled drivetrain response and transmission refinement expected from the factory Porsche GT3 manual drivetrain.

Designed for the GT3 Manual Drivetrain

The 991.2 GT3 combines its naturally aspirated 4.0-litre flat-six engine with Porsche's 6-speed GT sports manual transmission on manual-equipped cars. The dual-mass flywheel is specifically designed to work between these two major drivetrain components. Its internal damping system helps control the torsional pulses generated by the engine before they are passed through the clutch and into the gearbox.

Correct flywheel operation contributes to:
•  Smooth torque transfer
•  Progressive clutch engagement
•  Reduced transmission vibration
•  Reduced gearbox resonance
•  Controlled drivetrain behaviour
•  Improved low-speed refinement

What Does a Dual-Mass Flywheel Do?

Unlike a conventional single-piece flywheel, a dual-mass flywheel contains two primary rotating sections linked by an internal damping mechanism.

The primary mass connects to the crankshaft while the secondary mass interfaces with the clutch.

Internal springs and damping components allow a controlled degree of movement between the two sections, helping absorb rotational irregularities created by the engine.

This reduces the amount of vibration transmitted into the gearbox and helps maintain smooth operation throughout the drivetrain.

Why Replace a Worn Dual-Mass Flywheel?

A dual-mass flywheel operates under substantial rotational load and is exposed to repeated acceleration, deceleration and clutch engagement cycles. Its internal bearings and damping components can wear over time.

Possible symptoms of a worn or damaged flywheel include:
•  Rattling from the clutch or bellhousing area
•  Excessive vibration at idle
•  Clutch judder
•  Vibration during acceleration
•  Clunking when starting or stopping the engine
•  Increased gearbox noise
•  Excessive rotational free play
•  Irregular clutch engagement
•  Drivetrain vibration when engine load changes

Correct diagnosis is recommended because similar symptoms can also originate from the clutch, engine mounts or transmission components.

LuK Drivetrain Technology

LuK specialises in clutch and flywheel technology and is widely recognised for its development of dual-mass flywheel systems.

The 415097010 is designed to provide the fit and operating characteristics required by the Porsche manual GT drivetrain while controlling torsional vibration between the high-revving engine and gearbox.

For owners carryingut a factory-style repair, it provides a premium replacement alternative while retaining dual-mass flywheel operation.

Recommended Replacement Items

When replacing the flywheel, it is advisable to inspect the complete clutch system at the same time.

Consider checking or replacing:
•  Clutch friction disc
•  Clutch pressure plate
•  Release bearing
•  Pilot bearing
•  Flywheel mounting bolts
•  Pressure-plate bolts
•  Rear crankshaft oil seal
•  Clutch release components
•  Transmission input shaft seal

Because gearbox removal is required to access these components, replacing worn related parts during the same repair can help avoid duplicated labour.

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

9P1105262D

The product you are viewing cross references to these numbers

Dual-mass flywheel. 

Fits:
Cars with PDK transmission (dual clutch) (PR:250)
Porsche 911 (991) 4.0 GT3 RS / R (368kw) 04/2015 - 12/2020
Porsche 911 (991) 4.0 GT3 (368kw) 05/2017 - 12/2020
Porsche 911 (991) 4.0 GT3 RS (383kw) 05/2018 - 12/2020
Porsche 911 (992) GT3 (375kw)  05/2021 - 05/2024
Porsche 911 (992) GT3 RS (386kw) 09/2022 - 05/2024

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

9P1105264C

The product you are viewing cross references to these numbers

Dual-mass flywheel. 

Fits:
Cars with PDK transmission (dual clutch) (PR:250)
Porsche 911 (991) 4.0 GT3 RS / R (368kw) 04/2015 - 12/2020
Porsche 911 (991) 4.0 GT3 (368kw) 05/2017 - 12/2020
Porsche 911 (991) 4.0 GT3 RS (383kw) 05/2018 - 12/2020
Porsche 911 (992) GT3 (375kw)  05/2021 - 05/2024
Porsche 911 (992) GT3 RS (386kw) 09/2022 - 05/2024

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

9P1105264C

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Ninemeister 9m Single Mass Lightweight Flywheel 

Transform the response of your Porsche GT3 drivetrain with the Ninemeister 9m Single Mass Lightweight Flywheel, developed for Porsche 991 and 992 GT3 and GT3 RS models equipped with PDK transmission.

Fits:

• Porsche 991.1 GT3 3.8L (475 Bhp) 2014-16
• Porsche 991.1 GT3 RS 4.0L (500 Bhp) 2015-16
• Porsche 991.2 GT3 4.0L (500 Bhp) / GT3 RS 4.0L (520 Bhp) 2017-19
• Porsche 992.1 GT3 4.0L 2021-24
• Porsche 992.1 GT3 RS 4.0L 2022-24

CNC machined from high-carbon forged billet steel, the 9m flywheel provides an impressive 45% weight reduction compared with the original component. By substantially reducing rotating mass and engine inertia, the engine can change speed more freely, producing sharper throttle response and quicker acceleration.

Designed as a direct replacement, this is a highly effective performance upgrade for GT3 and GT3 RS owners looking for a more immediate and responsive drivetrain without fundamentally changing the engine itself.

What Does a Flywheel Do?

The flywheel is connected to the engine crankshaft and forms an important link between the engine and transmission. Its rotating mass helps manage the transfer of engine torque while maintaining momentum as engine speed changes.

A conventional heavier flywheel stores more rotational energy, which can help smooth drivetrain operation. However, the engine must also accelerate and decelerate this additional mass every time the RPM changes.

Reducing flywheel weight means the engine has less rotating mass to accelerate, allowing it to respond more quickly to throttle inputs.

Why Upgrade to a Lightweight Single Mass Flywheel?

The key advantage of the Ninemeister 9m flywheel is its 45% reduction in weight.

Reducing rotating mass has a particularly noticeable effect because the flywheel is continuously accelerated and decelerated with the engine. With less inertia to overcome, the engine can gain and lose RPM more rapidly.

The result is a drivetrain that feels more immediate and responsive, particularly during rapid acceleration and performance driving.

Benefits include:

• 45% weight reduction
• Reduced rotating mass
• Lower engine inertia
• Quicker engine response
• Improved throttle response
• Faster acceleration
• More immediate engine character
• Reduced drivetrain power losses
• More engine power available at the wheels

The upgrade does not create additional engine horsepower in the same way as an engine modification. Instead, reducing the energy required to accelerate the flywheel can reduce rotational losses during acceleration, allowing more of the engine's available performance to reach the wheels.

CNC Machined Forged Billet Steel Construction

The Ninemeister 9m flywheel is CNC machined from high-carbon forged billet steel, combining reduced weight with the strength required for a high-performance drivetrain application.

Precision CNC machining ensures accurate dimensions and consistent manufacture, while the forged steel construction makes this flywheel particularly well suited to the high engine speeds and performance demands associated with Porsche GT3 and GT3 RS models.

Porsche 991 / 992 GT3 & GT3 RS Lightweight Flywheel Upgrades

Lightweight drivetrain components are an effective way of improving engine response without relying solely on increasing engine output. On high-revving Porsche GT models, reducing rotating mass allows the engine to react more quickly to changes in throttle position.

A lightweight flywheel is therefore particularly suited to Porsche 991 GT3, 991 GT3 RS, 992 GT3 and 992 GT3 RS models used for enthusiastic road driving, track days and other performance-focused applications.

Unlike modifications designed purely to increase peak horsepower, reducing flywheel mass changes how quickly the engine can respond. This can make the drivetrain feel more eager and immediate, complementing the naturally responsive character of Porsche's GT3 engine.

Why Choose the Ninemeister 9m Lightweight Flywheel?

Ninemeister's 9m lightweight flywheel combines a substantial 45% reduction in weight with CNC-machined high-carbon forged billet steel construction.

For GT3 and GT3 RS owners seeking sharper throttle response, reduced inertia and quicker acceleration, it provides a direct-replacement solution designed to improve drivetrain responsiveness while retaining a high-strength steel flywheel construction.

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

9M9P1105264

The product you are viewing cross references to these numbers