ACT 1991 Toyota MR2 HD/Perf Street Sprung Clutch Kit
ACT TM1-HDSS is the daily-driver upgrade for an SW20 Toyota MR2 Turbo. Our listing is titled for the 1991 MR2, and ACT catalogs this kit for the 1991-1995 MR2 Turbo with the 2.0L 3S-GTE. If your Turbo slips when boost arrives in third or fourth, chatters pulling out of a parking spot, or the pedal now engages near the top of its travel, this kit restores a clutch that holds more than stock while keeping a smooth organic disc and a pedal you can live with in traffic.
In the mid-engine MR2 the clutch sits between the 3S-GTE flywheel and the transaxle input, behind the cabin. A boost-up 3S-GTE makes torque quickly, and a factory clutch that was sized for stock boost lets go first. TM1-HDSS uses ACT's T023 Heavy Duty pressure plate, whose diaphragm is heat treated in four stages to raise clamp load and limit deflection at high rpm, with a 3000604 Performance Street sprung disc. The disc is organic with high copper content for heat transfer, steel-backed for burst strength, and the sprung hub absorbs the driveline shock of a mid-engine car taking off.
ACT rates the kit at 390 ft-lb at the crank, 32 percent over the factory clutch. The disc is 236 mm (9.3 in) with a 1.125 in input spline, and the kit weighs 14.7 lb. ACT describes the feel as light to moderate pedal effort with smooth, positive engagement and OE to mild gear rattle, which is why this is the version most street MR2 owners choose. Its FAQ puts the pedal increase for Heavy Duty plates at roughly 15 to 40 percent over stock.
Bleed the clutch hydraulics and make sure the pedal returns fully, since a dragging slave cylinder can mimic a bad clutch. Check the bellhousing area for engine oil, because a leaking rear main seal will soak and ruin any new disc. Then do a loaded test: third or fourth gear, low rpm, full throttle, and watch whether rpm rises without the car pulling harder. Our clutch slipping guide covers that test in detail, clutch chatter on takeoff explains shudder causes, and our slipping diagnosis guide shows how to read rpm against road speed.
ACT lists TM1-HDSS for the 1991, 1992, 1993, 1994 and 1995 Toyota MR2 Turbo, 2.0L 3S-GTE DOHC. It is a Turbo-only kit: the naturally aspirated MR2 uses a different engine and clutch, so do not order it for a non-turbo car. Many SW20s have had engines or flywheels swapped over the years, so match the flywheel on the car and send us your year and VIN if you are unsure. More holding power for a bigger turbo is available in the TM1-HDR6 6-pad race kit and the race-only TM1-XTR4.
| Brand | ACT |
| Part number | TM1-HDSS |
| Fits | ACT 1991 Toyota MR2 HD/Perf Street Sprung Clutch Kit |
| Vehicle fitment | Toyota Mr2 Hd/Perf (1991) |
| Type | Clutch Kits - Single |
| Condition | New |
| Ships | Same business day (in stock), from the USA |
| Warranty | 1-year |
No. ACT lists it only for the 1991-1995 MR2 Turbo with the 2.0L 3S-GTE. The naturally aspirated cars use a different clutch.
ACT rates TM1-HDSS at 390 ft-lb at the crank, 32 percent over the factory clutch. For bigger turbo builds or launches, look at the TM1-HDR6 or TM1-XTR4 race kits.
The T023 Heavy Duty pressure plate, the 3000604 Performance Street sprung disc, the AT72 alignment tool and the RB446 release bearing. The flywheel is not included.
ACT describes the feel as light to moderate. Its FAQ puts the increase for Heavy Duty plates at about 15 to 40 percent depending on the car.
The kit works with a resurfaced factory flywheel in good condition. If yours is heat-cracked or worn past spec, replace it; ACT's 600390 Prolite is listed for the MR2 Turbo.
