Clutch Masters 89-98 Nissan 240SX SRDET Eng. & Trans. / 89-UP Nissan Silvia SRDET Eng. & Trans. All
If you are running an SR20DET in an S13 or S14 chassis, whether a factory Silvia or a 240SX that has been swapped, and the stock flywheel is heat-checked, worn past resurfacing or simply too heavy for the way you drive, the Clutch Masters FW-760S-AL is a billet aluminum replacement built for that engine and its 5-speed gearbox. Clutch Masters lists it for the 1989-1998 SR20DET with the matching transmission in rear-wheel-drive Silvia and 240SX builds.
The flywheel bolts to the back of the crank, carries the starter ring gear and gives the clutch disc a flat friction face to clamp against. Mass in the flywheel smooths idle and helps the car pull away, but it also slows how fast the engine can gain and shed revs. Cutting that mass lets the SR20DET spin up faster between shifts and, as Clutch Masters puts it, helps reduce turbo lag because the engine reaches boost-building rpm sooner. The trade is a lighter feel on launch from a stop, so expect to use a little more throttle when pulling away in first.
Clutch Masters machines its aluminum flywheels in-house from 6061 billet on CNC lathes, Type 3 hard anodizes the body, zero-balances each one and certifies them to SFI 1.2 for motorsport use. Aluminum is not a good clutch face on its own, so the disc runs against a bolted-in steel insert. When that insert wears, it is replaced rather than the whole flywheel being machined.
Slipping in a manual car is almost always the clutch assembly, not the gearbox, but rule out a leaking rear main seal or contaminated disc first. A high-gear, low-rpm roll-on where the revs climb without the car accelerating is the classic test. Our slipping diagnosis guide walks through separating slip from other drivability faults, and our resurface vs. replace guide covers how much wear a stock flywheel can take before it should be retired.
This listing covers the SR20DET engine with its 5-speed transmission in 1989-1998 S13/S14 cars, including 240SX bodies running an SR20DET swap and the factory Silvia. It is not for a stock KA24 240SX, which uses its own KA24-specific flywheel. Clutch Masters lists a separate part, FW-760S6-AL, for the later SR20DET Spec R 6-speed, so this 5-speed part is not the one for an S15 6-speed. Swapped cars vary, so match your clutch and gearbox, or send us your year, VIN and swap details and we will check before it ships. More SR20DET parts are in our hard parts collection.
Comparing options? See the SPEC SN22A aluminum flywheel and the Competition Clutch 10.28 lb steel flywheel for the same engine.
| Brand | Clutch Masters |
| Part number | FW-760S-AL |
| Fits | Clutch Masters 89-98 Nissan 240SX SRDET Eng. & Trans. / 89-UP Nissan Silvia SRDET Eng. & Trans. All |
| Vehicle fitment | Nissan 240Sx Srdet Eng. & (1989-1998) |
| Type | Flywheels |
| Condition | New |
| Ships | Same business day (in stock), from the USA |
| Warranty | 1-year |
No. It is built for the SR20DET engine and its 5-speed transmission. A KA24DE needs a KA24-specific flywheel. If your 240SX has an SR20DET swap with the matching 5-speed, it is the right application.
Clutch Masters lists a different part, FW-760S6-AL, for the 1999-2002 SR20DET Spec R 6-speed. This listing is the 5-speed version.
The clutch runs on a replaceable steel insert, so when the friction face wears you replace the insert instead of machining the aluminum body.
It revs and drops revs faster, which most owners like, but pulling away from a stop takes a little more throttle and the idle can feel less settled. It is a common street and track upgrade on SR20DET cars.
Replace the pilot bearing, release bearing and flywheel bolts, inspect the rear main seal, and install a clutch kit rated for your power level.
