Spec 98-02 Firebird/Trans Am / 97-04 Corvette / 04-06 GTO/Cadillac CTS-V Aluminum Flywheel
SPEC SC75A is a 14 lb billet aluminum flywheel for the flat-face GM LS clutch setup used on the C5 Corvette and the 1998-2002 Camaro and Firebird. Owners shopping for it usually have a manual LS1 or LS6 car that is getting a new clutch after a tune, cam or forced-induction build, and want the engine to rev and drop rpm faster between shifts. SPEC also lists it for the Pontiac GTO, the first-generation CTS-V and the SSR, with notes we cover in the fitment section below.
In these cars the flywheel bolts to the crankshaft flange, carries the starter ring gear, and is the friction face the clutch disc clamps against before torque reaches the T56 six-speed. The stock part is heavier steel or iron. SC75A replaces it with a single-piece aluminum body, which lowers rotating inertia so the 5.7L builds revs more quickly in each gear and matches revs more easily on downshifts. The trade-off is a little less momentum leaving a stop, so launches need a few more rpm. Our lightweight vs stock flywheel guide explains what changes in daily driving before you commit.
A slipping clutch shows up as engine rpm climbing in a high gear while road speed does not. Our slipping diagnosis guide walks through logging rpm against speed, and the flare vs slip guide helps when the symptom only appears during a shift. Chatter on takeoff can also come from oil on the disc or tired engine and trans mounts, which the clutch chatter guide separates out. A soft or sinking pedal usually means the T56 hydraulic release bearing or master cylinder, not the flywheel.
SPEC lists SC75A for the 1997-2004 Chevrolet Corvette 5.7L, the 1998-2002 Camaro V8 5.7L, and the 1998-2002 Firebird and Trans Am V8 5.7L. Those are the LS1 cars plus the LS6 2001-2004 Corvette Z06. SPEC also lists the 2004-up Pontiac GTO, and lists the 2004-2007 Cadillac CTS-V and 2005-2006 SSR only for non-ratcheting clutch upgrades that run a flat LS1/LS6-style flywheel, with the CTS-V note calling for a slave spacer. Several of those later cars left the factory with the LS2, so treat them as conversion fitment and plan the clutch, spacer and flywheel as one package. Our listing's vehicle line shows a CTS-V with 1998-2002 dates; that is a data error, and the SPEC list above is the correct application. Match your current flywheel bolt pattern and clutch bolt pattern, or send us the year and VIN and we will confirm. You can browse more parts in our hard parts collection.
SC75A is new, in stock, ships from the USA the same business day, and carries a 1-year warranty.
| Brand | SPEC |
| Part number | SC75A |
| Fits | Spec 98-02 Firebird/Trans Am / 97-04 Corvette / 04-06 GTO/Cadillac CTS-V Aluminum Flywheel |
| Vehicle fitment | Cadillac Cts-V Aluminum (1998-2002) |
| Type | Flywheels |
| Condition | New |
| Ships | Same business day (in stock), from the USA |
| Warranty | 1-year |
Yes. SPEC lists it for the 1998-2002 Camaro V8 5.7L and the 1998-2002 Firebird and Trans Am V8 5.7L, the LS1 cars with the T56 six-speed manual.
SPEC lists the 1997-2004 Corvette 5.7L, which covers both the LS1 cars and the 2001-2004 Z06 with the LS6. Confirm your clutch is a flat-flywheel LS1/LS6 design.
SPEC lists those cars, but for the CTS-V and SSR only with non-ratcheting clutches built for a flat LS1/LS6-style flywheel, and the CTS-V note calls for a slave spacer. Plan the clutch and flywheel together and send us the VIN to confirm.
SPEC lists 14 lb for SC75A.
The clutch disc and pressure plate, the pilot bearing if it is rough, the hydraulic release bearing if it weeps, flywheel bolts, and the clutch fluid.
