ACT 1998 Chevrolet Camaro Sport/Perf Street Sprung Clutch Kit
ACT GM9-SPSS is the mildest of ACT's single-disc kits for the LS-powered F-body, built for a Camaro that is stock or close to it and simply needs a clutch that holds again. Our listing is titled for the 1998 Camaro, and ACT applies it to the 1998-2002 Camaro Z28 and Z28 SS with the 5.7L LS1 and a manual gearbox. If your Z28 slips on the highway, smells hot after a hill start, or the pedal now bites near the top, this is the kit for someone who wants a factory-like pedal with more holding margin than the original.
GM9-SPSS combines ACT's Sport pressure plate, part GM015S, with the 3000909 Performance Street sprung disc. The Sport plate uses ACT's heat-treated diaphragm to add clamp load over stock without the jump in pedal effort that comes with the Heavy Duty plate. The disc is 11 in (280 mm) with organic, copper-rich facings on a steel backer and a sprung hub, splined to fit the 1.125 in input shaft. ACT rates the kit at 650 ft-lb at the crank, 31 percent over the original clutch, and describes the feel as light to moderate effort, smooth engagement and OE to mild gear rattle.
That rating leaves comfortable headroom for an LS1 with an intake, headers and a tune. Once a car has a cam and gears and sees drag strip launches, the GM9-HDSS Heavy Duty kit with the same disc and a stronger plate is the better step, and the GM9-HDG6 six-pad race kit is for power-adder builds.
Start with a load test: warm engine, fourth gear at about 2,000 rpm, then full throttle. A slipping disc shows up as the tach running ahead of the speedometer. Next look at the release hydraulics, because the LS1 F-body uses a concentric slave inside the bellhousing, and a leaking slave can contaminate the disc or leave it partly applied. Check the clutch reservoir level and look for fluid at the bellhousing drain area. Our slipping diagnosis guide explains the road test, flare vs. slip helps separate an engine or traction issue from a true slip, and clutch slipping causes covers the clutch-specific checks.
ACT lists GM9-SPSS for the 1998-2002 Camaro Z28 and Z28 SS 5.7L LS1, the 1998-2002 Firebird Formula and Trans Am LS1, the 1997-2004 C5 Corvette including the 2001-2004 LS6 Z06, the 2005-2013 C6 Corvette with the 6.0L LS2 or 6.2L LS3, the 2004 GTO 5.7L and the 2005-2006 GTO 6.0L. It is not listed for the V6 Camaro or the earlier LT1 cars. ACT's note says the kit must run on a flat flywheel, or on its 600585 XACT Prolite flywheel for LS2, LS3 and LS7 engines. If the car has an engine swap, a stepped flywheel or a non-factory transmission, send us the year and VIN before ordering. More LS F-body parts are on our Camaro parts page.
| Brand | ACT |
| Part number | GM9-SPSS |
| Fits | ACT 1998 Chevrolet Camaro Sport/Perf Street Sprung Clutch Kit |
| Vehicle fitment | Chevrolet Camaro Sport/Perf (1998) |
| Type | Clutch Kits - Single |
| Condition | New |
| Ships | Same business day (in stock), from the USA |
| Warranty | 1-year |
Both use the same 3000909 sprung organic disc. SPSS uses ACT's Sport plate and is rated at 650 ft-lb, 31 percent over stock; HDSS uses the Heavy Duty plate for more clamp load and a firmer pedal. SPSS suits stock and lightly modified cars.
ACT lists it for 1997-2004 C5 Corvettes including the LS6 Z06 and 2005-2013 C6 Corvettes with the LS2 or LS3. LS2 and LS3 cars need a flat flywheel or ACT's 600585 flywheel.
No. The kit has the pressure plate, disc and alignment tool. LS1 F-bodies use a concentric hydraulic slave that includes the bearing, so inspect or replace it during the job.
ACT describes the feel as light to moderate pedal effort with smooth engagement, the lightest of its GM9 single-disc kits.
Yes if it is flat and in good condition after resurfacing. ACT requires a flat flywheel, so a stepped flywheel will not work with this kit.
Drive gently for the first few hundred miles with smooth engagements and no launches so the organic disc seats against the flywheel and pressure plate.
