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    Shark Werks4.0 GT3RS Lightweight Flywheel & Clutch Kit for 996 / 997 / GT3 / GT3RS

    Product type: Transmission
    Application:
    • 911 GT3 RS 4.0 - 997.2
    • 911 GT3 RS - 997.2
    • 911 GT3 RS - 997
    • More
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    price$4549
    Include Factory 997.2 Underdrive Crank Pulley Kit w/ OEM Belt
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    Product Description

    No mezger based GT3 engine should be hampered with stock dual mass flywheel. A light weight flywheel (RS) conversion is how they were meant to rev from the factory. If you're looking for the lightest, strongest available one using factory parts on any 996 / 997 /997.2  GT3 then this is the kit to have. Even if you already have a LWF in a 997.1 GT3RS and your clutch is worn out, it will need replacing. This kit will not only provide a freer-revving experience but improves upon the older and heavier parts with lighter & stronger components. This is kit will still be an upgrade for any 997.2 GT3RS that needs a clutch replacement utilizing the beefier 4.0RS parts.

    With a single mass (Light Weight) flywheel kit you get considerably better acceleration resulting from less rotational mass. From the factory, it's what gives the GT3RS an edge over the regular GT3. The engine will no longer feel lethargic/lazy when revving. The dual-mass (or "twin mass") flywheel that we replace is effectively two flywheels in one, connected to each other by a coupling that allows the two flywheels to rotate relative to each other in a range up to 15 degrees, but with a small amount of resistance to this movement. This movement, inertia and resistance of the stock dual mass flywheel cushions the power pulse variations that can cause gear rattle (Porsche strangely decided this would be better for non RS customers). Dual-mass flywheels use a simple solid-center clutch disk. It is more difficult to change the speed of the dual-mass flywheel, whether accelerating it or slowing it down... that means besides inhibiting engine acceleration to some degree, it also inhibits the deceleration that occurs between every power pulse. A single-mass flywheel is the same sort of design as a solid aluminum lightweight flywheel: a rigid disk of metal, either aluminum or steel.

    The weight difference is significant with the stock dual mass weighing in at 28.5 pounds vs. single mass at around 10 pounds. Additionally, if you're thinking of replacing your old / worn out 997.1 GT3RS clutch, our newest and stronger 4.0 version is even lighter than the original 3.6L GT3RS- and your engine will rev up / down even faster than before.

    When performing this new clutch upgrade at the shop we always replace the often-worn out clutch release arm, shaft and bearings external to the transmission. These parts are available as a kit here. 

    RS Clutch Kit includes:

    • Porsche 4.0 RS pressure plate **
    • OEM 4.0 RS light weight flywheel (8.34 lbs - considerably lighter than 3.6 RS flywheel)
    • OEM 4.0 RS clutch disc
    • OEM throw-out bearing 
    • OEM pilot bearing
    • OEM guide tube and screws
    • OEM flywheel bolts
    • OEM pressure plate bolts
    • OEM ring gear 

    ** Beware of cheaper kits you find online! They often will include the MUCH cheaper riveted pressure plate that came stock on a 997.2 GT3RS 3.8. The pressure plate was a common weakness/failure point on those cars because the rivets holding the straps together would break or come loose. The best replacement pressure plate is from the GT3RS 4.0 and is bolted together. It's also much more expensive and only sold through Porsche dealers. We use this version in our kits, along with the  same combination of parts we use on all 4.1L engine builds and local installations for 996, 997, and 997.2 GT3 and RS models. 
    Additional Pulley Kit add-on required on all 996 or 997.1 GT3/RS cars (not required for 997.2 models)
    NOTE: After the car warms up there is some additional rattle/noise from the transmission at idle. This is normal and like a factory 997 GT3RS.

    Example Video: Listen to the revs climb & drop on our 997.2 GT3RS:

     

    You can see this product installed on cars in our project gallery:

    Features

    Sharky's Note: The free-revving mezger GT3 engine was born to rev and yet more than half of all cars came with the heavier dual mass flywheel/clutch set up. With its light-weight internal engine parts only the factory RS models (or Clubsport non RS) were ever out-fitted with the full-experience and light-weight flywheel hardware. This is unfortunate for any non RS but can be fixed with the parts above. No doubt this has become our favorite modification to do over the years on our own cars and for our friends and customers. The character of the engine, the improved acceleration is transformed to the RS-level as it should be. There's a sense of "getting away with something" on a narrow body non RS once the LWF conversion is fitted. You're essentially getting that widebody experience but in a skinnier platform. Literally any mezger GT3 owner without the LWF conversion is missing out on what this engine was intended to do and capable of delivering. Until you've driven a mezger GT3 with a LWF you haven't really fully-experienced it...