ACT 1993 Toyota Supra XACT Flywheel Prolite
The ACT 600400 is the lightest XACT flywheel ACT makes for the 1993-1998 Toyota Supra Twin Turbo. At 13.4 lb of forged chromoly it is built for the MKIV owner who wants the 2JZ-GTE to rev like a race engine: road course cars, time attack builds, rally cars and anyone tired of the heavy factory flywheel dulling throttle response between corners. It is usually bought during a clutch upgrade, when the transmission is already out and the old flywheel is glazed, cracked or simply too heavy for the build.
Every flywheel stores energy. A heavy one smooths idle and helps a car pull away from a stop, but it also slows how quickly the engine can gain or lose rpm. ACT calls the Prolite its lowest-inertia design, aimed at the best possible throttle response and acceleration. On a turbo Supra that means the engine spins up faster out of slow corners, falls faster for downshifts and heel-toe blips, and holds the turbos in their working range with less lag between gears.
The part itself is a one-piece, heat-treated forging that ACT CNC machines and dynamically balances for high-rpm use. The 115-tooth ring gear is induction hardened, and there is no separate insert to warp or loose ring gear to spin. It carries SFI 1.1 certification for sanctioned events. The trade is street manners. ACT rates the feel as mild to moderate gear rattle, says drivability is reduced and recommends the Prolite for race use. If the car is mostly driven on the street, the heavier 600405 Streetlite at 19.2 lb is the gentler choice, and our lightweight vs stock flywheel guide explains how much difference weight makes.
Most flywheel decisions are made on the bench. With the gearbox out, clean the face and check it closely under good light: light glazing machines away, but cracks that reach toward the bolt holes or deep heat spots do not. Our resurface vs replace guide covers where that line sits. If the real complaint is slip and you have not opened it up yet, run the road test in our slipping diagnosis guide first, and read shift flare vs. slip so a fast rev rise between gears is not mistaken for a failed clutch.
Our listing names 1993, and ACT's application table lists 600400 for every 1993 through 1998 Toyota Supra Twin Turbo with the 3.0L DOHC turbocharged six. It is not listed for the non-turbo Supra or for the 1986-1992 cars. ACT specifies a 250 mm (9.8 in) friction surface and 115 ring gear teeth, and the flywheel bolts are included (M10-1.25 x 25 mm). ACT also reminds buyers that the clutch must suit the flywheel step, thickness, tooth count and ring gear offset, so run a 250 mm Supra Turbo clutch made for the stock-style flywheel. If the car has an engine or transmission swap, send us the year, VIN and parts list before ordering. Browse more flywheels in our hard parts collection.
The 600400 is new, in stock, ships from the USA the same business day and is backed by a 1-year warranty.
| Brand | ACT |
| Part number | 600400 |
| Fits | ACT 1993 Toyota Supra XACT Flywheel Prolite |
| Vehicle fitment | Toyota Supra Xact (1993) |
| Type | Flywheels |
| Condition | New |
| Ships | Same business day (in stock), from the USA |
| Warranty | 1-year |
ACT lists it for 1993-1998 Toyota Supra Twin Turbo models with the 3.0L turbo six. Our listing names 1993, but the same part covers all six years.
ACT lists the 600400 Prolite at 13.4 lb and the 600405 Streetlite at 19.2 lb. Both are chromoly with a 250 mm friction surface and 115 teeth.
It works, but ACT rates it for race use with reduced drivability and mild to moderate gear rattle. A mostly-street car is better served by the 600405 Streetlite.
Yes. ACT includes the flywheel bolts (M10-1.25 x 25 mm). The pilot bearing and clutch are separate.
Yes. ACT says XACT flywheels resurface like a stock flywheel. Remove no more than 0.040 in and keep the factory step.
ACT does not list it for the naturally aspirated Supra. Send us your VIN if you are not sure which engine the car has.
