Clutch Masters 02-09 Porsche Boxer 2.5L 2.7L 3.2L 3.4L / Boxer- S 2.5L 2.7L 3.2L 3.4L / 06-09
The Clutch Masters FW-005-AL is a lightweight billet aluminum flywheel for the manual-transmission Porsche Boxster, Boxster S and early Cayman with the 2.5L, 2.7L, 3.2L and 3.4L flat-six. Owners shopping for it usually have a clutch job coming up, a worn or heat-checked factory flywheel, or want the engine to rev up and fall back faster between shifts on a canyon road or track day.
The flywheel bolts to the back of the crankshaft and gives the clutch disc its friction surface. Its mass stores energy, which smooths idle and launches, but that same mass slows how quickly the engine can change speed. Replacing the factory flywheel with a lighter aluminum one lets the mid-mounted flat-six respond faster to the throttle and match revs more quickly on downshifts. Clutch Masters machines FW-005-AL in the USA from a 6061 aluminum billet on CNC lathes, zero balances it, and Type 3 hard anodizes it for durability. It is SFI 1.2 certified for motorsport use and is designed to run with an OEM clutch kit or a Clutch Masters FX100 through FX500 single disc kit.
If the clutch is slipping, confirm the cause first: our slipping diagnosis guide explains the road test, and clutch chatter causes covers oil contamination and flywheel damage. A leaking rear main seal can soak the clutch with oil, so look at the bell housing for wetness before ordering parts. A lightweight flywheel is a performance choice: expect a slightly lumpier idle, a bit more care pulling away from a stop and possibly more gear noise compared with a heavy stock flywheel. For a car that is purely a daily commuter, a fresh factory-style flywheel may suit you better.
Clutch Masters lists FW-005-AL for these manual cars:
Our listing title runs through 2009, but the maker's chart stops at 2008. The 2009-up facelift cars moved to a 2.9L base engine, direct injection on the S and a new 6-speed manual, so do not order this for a 2009 or newer car without contacting us first. Tiptronic and PDK cars do not use a clutch flywheel. Send us your year, model and VIN and we will confirm. You can also browse the clutch and rebuild kit page.
Lock the crank before loosening the old flywheel bolts; a Porsche flywheel lock tool makes this a one-person job. Use new flywheel bolts, clean the crank flange and threads, and torque in a cross pattern to the Porsche factory spec. Wipe the anodized friction surface with brake cleaner before fitting the clutch. If your engine uses a pilot bearing in the crank, replace it now with a puller such as the OTC 7318. Pair it with a new disc, pressure plate and release bearing, inspect the rear main seal and the fork pivot, then bleed the hydraulics with fresh brake fluid. Follow a careful break-in with our clutch break-in guide.
| Brand | Clutch Masters |
| Part number | FW-005-AL |
| Fits | Clutch Masters 02-09 Porsche Boxer 2.5L 2.7L 3.2L 3.4L / Boxer- S 2.5L 2.7L 3.2L 3.4L / 06-09 |
| Vehicle fitment | Porsche Boxer (2002-2009) |
| Type | Flywheels |
| Condition | New |
| Ships | Same business day (in stock), from the USA |
| Warranty | 1-year |
Clutch Masters lists it through the 2008 model year. The 2009-up cars changed engines and moved to a new 6-speed manual, so contact us with your VIN before ordering for a 2009 or newer car.
No, it is the flywheel only. Clutch Masters designed it to work with an OEM Porsche clutch kit or one of their FX100 to FX500 single disc kits.
The engine revs up and drops faster, which helps rev matching and throttle response. Expect a slightly less smooth idle and more care needed when pulling away from a stop compared with the heavier factory part.
Clutch Masters states the flywheel is SFI 1.2 certified for motorsports. Check your sanctioning body rules for anything beyond that.
The friction face is hard anodized aluminum. Ask a machine shop that works with aluminum flywheels before attempting a resurface, as it is not handled like a cast iron flywheel.
Install new flywheel bolts and a new clutch disc, pressure plate and release bearing. Check the rear main seal for leaks and bleed the clutch hydraulics with fresh fluid.
