ACT 07-11 Toyota Lotus 1.8 L4 DOHC XACT Flywheel Prolite
ACT 600515 is the XACT Prolite flywheel for the Toyota-powered Lotus Elise and Exige, and our listing covers the 2007-2011 cars with the 1.8L DOHC four-cylinder. Owners shopping for it usually want sharper throttle response on track days, quicker rev-matched downshifts, or a replacement after the factory flywheel has been heat-checked by a slipping clutch. At 8.2 pounds it is the lightest flywheel ACT makes for this engine, and it is built for track use first.
The Elise and Exige use the Toyota 2ZZ-GE engine, which Lotus allows to rev to 8,500 rpm. A flywheel stores rotating energy, smooths out power pulses and gives the clutch disc its rear friction face. Cutting its weight lets the engine gain and drop revs faster, which helps a high-revving, low-torque engine accelerate out of corners and makes heel-and-toe downshifts snappier. ACT describes the Prolite as its lowest-inertia design, aimed at road racing and rally use, with reduced drivability compared with a heavier flywheel.
The 600515 is a one-piece chromoly steel forging, CNC machined and computer balanced, with an induction-hardened ring gear. Because it is one piece, there is no separate insert to warp and no pressed-on ring gear to come loose. ACT lists a 212 mm friction surface, a 106-tooth ring gear and SFI 1.1 certification, and it supplies M10-1.25 x 25 mm flywheel bolts. It can also be resurfaced later without buying extra parts.
Most flywheel faults show up only once the gearbox is out, so inspect the face whenever the clutch is replaced. A slipping clutch is easy to confuse with other drivability problems; our flare versus slip guide and our slipping diagnosis guide explain the load test. If you only want lighter weight on a street car, be honest about use: ACT notes mild to moderate gear rattle with this flywheel and recommends it for race use.
Our listing is for 2007-2011 Lotus Elise and Exige models with the Toyota 1.8L DOHC engine. ACT's application chart also lists this flywheel for 2005-2006 Elise and Exige, the 2000-2005 Toyota Celica GTS, the 2003-2006 Matrix XRS and the 2005-2006 Corolla XRS, which share the same engine. ACT does not list it for the Celica GT or the base Matrix and Corolla, which use the 1ZZ engine. Check the ring gear tooth count and the clutch you plan to run, or send us your year and VIN to confirm. ACT clutch kits for this car, such as the LE1-HDSS street kit, are listed in our hard parts and clutch section.
| Brand | ACT |
| Part number | 600515 |
| Fits | ACT 07-11 Toyota Lotus 1.8 L4 DOHC XACT Flywheel Prolite |
| Vehicle fitment | Toyota Lotus 1.8 L4 Dohc (2007-2011) |
| Type | Flywheels |
| Condition | New |
| Ships | Same business day (in stock), from the USA |
| Warranty | 1-year |
ACT lists it for the 2000-2005 Celica GTS, 2003-2006 Matrix XRS and 2005-2006 Corolla XRS, which use the same 1.8L DOHC engine as the Lotus. Our listing is for the 2007-2011 Elise and Exige, so send us your year and VIN to confirm a Toyota application.
ACT lists the 600515 at 8.2 lbs. It is ACT's Prolite design, its lowest-inertia flywheel option.
It works, but ACT recommends it for race use and notes mild to moderate gear rattle and reduced drivability. A heavier flywheel is easier to live with on the street.
Yes. ACT includes M10-1.25 x 25 mm flywheel bolts.
Yes. ACT says its flywheels are serviceable and can be resurfaced without buying additional parts.
Install a new clutch kit, pilot bearing and release bearing at the same time, since the gearbox has to come out either way.
