Clutches / Flywheels

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
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9M9P1105264

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Lightweight Steel Flywheel.
OEM pressure plate.
Includes Aasco clutch release bearing.

OE or Sachs pressure plate 883082_000884



Fits:
Porsche 997.2 C2S/C4S 3.8L 2009-12
Porsche 991 C2S/C4S 3.8L 2012-14

Features:
• Light-weight for improved performance and drastically reduced M.O.I.
• 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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106424-12

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Lightweight Steel Flywheel and Clutch Kit.
Includes Sachs Performance clutch kit



Fits:
Porsche 997.2 & 991 997.2 2009-16 3.6L/3.8L
Steel DFI

Features:
• Light-weight for improved performance and drastically reduced M.O.I.
• Replaceable heat shield (friction surface), no need to surface flywheel
• 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 like 6061-T6 aluminum for the flywheel, treated steel for the heat shield 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

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106425-12-PKG

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Uprated clutch and lightened flywheel kit. 

Fits:
Porsche 991.1 Carrera 2 / Carrera 4 - 2012 to 2016
Porsche 991.1 Carrera 2S / Carrera 4S - 2012 to 2016

9m Lightweight Flywheel

• CNC machined high carbon forged billet steel material
• 45% weight reduction
• Direct replacement
• Quicker acceleration
• Reduced rotating mass and less engine inertia
• Better throttle response
• OEM clutch compatible
• More power to the wheels

9m 991.1 Upgraded clutch kit 

• Higher thermal capacity compared to OEM friction material
• Higher transmittable torque compared to OEM
• Performance pressure plate giving higher transmittable torque and higher clamp load
• Capable of over 550Nm torque
• Sprung uprated organic center plate with OEM pedal feel
• Ideal upgrade for typically fast road/track day cars and everyday use

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Related, superseded, cross reference or alternative numbers for comparison.

9M991LWF

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