ACT 93-95 Mazda RX-7 FD Mod-Twin 225 HD Sprung Street Clutch Kit
A 1993-1995 FD RX-7 with a single-turbo conversion, a big port or simply more boost will burn through the factory clutch quickly, and most single disc upgrades trade away the light pedal and smooth take-off that make the car pleasant on the street. ACT T1SS-MZ01 is the Mod-Twin 225 HD Sprung Street kit for the FD: two organic street discs, a sprung hub and a CNC-machined flywheel in one package, rated by ACT at 590 ft-lb at the crank. If your FD slips on boost in third, or you are building it past what a single disc will hold, this is the twin built for street driving.
ACT's Mod-Twin doubles the friction area by stacking two 225 mm (8.8 inch) organic friction plates with a floater between them, all clamped by a Heavy Duty pressure plate under a forged aluminum cover. ACT rates it at 100 percent more torque capacity than the original equipment clutch. Instead of each disc carrying its own spring hub, both steel-backed friction plates drive a single sprung Mono-Drive hub. That hub soaks up torsional vibration, which ACT says extends input shaft life and cuts driveline shock, and it is a large part of why this kit drives closer to stock than a rigid twin. The design is modular: ACT calls Mod-Twin fully rebuildable, with most parts sold separately, so a worn kit gets rebuilt rather than replaced. ACT lists the feel as soft, progressive engagement with light pedal effort and OE to mild gear noise, recommended for street or street/strip use.
Run a slip test in fourth from low rpm into boost and watch the tach against road speed. Then check the hydraulics, because a soft pedal from a failing slave or air in the line feels just like a worn disc. If power has not changed and the clutch is just worn, a single disc such as the ACT XT-M street kit or the factory-style Exedy OE replacement kit may be all the car needs. Our slipping diagnosis guide walks through separating clutch slip from other driveline faults.
ACT lists T1SS-MZ01 for the 1993, 1994 and 1995 Mazda RX-7 with the 1.3L twin-rotor engine, in Base, R1, R2 and Touring trims. It uses a 1 inch input shaft spline. One important detail: ACT notes the flywheel requires a counterweight that is not included in this kit. On a rotary the counterweight balances the eccentric shaft, and the car will not run smoothly without the correct one. ACT's CW02 counterweight is listed for the 1993-1995 RX-7. If your FD has a swapped gearbox or engine, send us the year, VIN and transmission details before ordering. Other FD options, including the Exedy Hyper Twin cerametallic kit, are in our rebuild kits category.
| Brand | ACT |
| Part number | T1SS-MZ01 |
| Fits | ACT 93-95 Mazda RX-7 FD Mod-Twin 225 HD Sprung Street Clutch Kit |
| Vehicle fitment | Mazda Rx-7 Fd Mod-Twin 225 (1993-1995) |
| Type | Clutch Kits - Multi |
| Condition | New |
| Ships | Same business day (in stock), from the USA |
| Warranty | 1-year |
ACT lists it for 1993-1995 RX-7 Base, R1, R2 and Touring models with the factory 1.3L rotary. Swapped engines or gearboxes need a fitment check, so send us your VIN and details.
Yes. ACT states the flywheel requires a counterweight that is not included. ACT's CW02 counterweight is listed for the 1993-1995 RX-7. Ask us when you order and we will confirm it.
ACT rates the Mod-Twin 225 HD Sprung Street kit at 590 ft-lb at the crank, which ACT says is 100 percent over the original equipment clutch.
ACT describes soft, progressive engagement with light pedal effort and OE to mild gear noise. Its Heavy Duty pressure plates typically add 15-40 percent pedal effort over stock.
Yes. The kit includes a CNC-machined, balanced flywheel, cover, diaphragm spring, friction plates, sprung Mono-Drive hub, floater, Monoloc collar, release bearing, alignment tool and a pilot bearing if needed.
ACT says Mod-Twin clutches are fully rebuildable and most components can be ordered separately, so a worn kit can be refreshed without buying a new flywheel.
