Advanced Clutch Technology (ACT) is a leader in high-performance drivetrain solutions, engineering cutting-edge clutch kits and flywheels for racing, street, and off-road applications. With a commitment to precision, durability, and innovation, ACT delivers superior torque capacity, faster shifts, and unbeatable reliability for enthusiasts and professionals alike. Whether you're pushing limits on the track or enhancing street performance, ACT's products are designed to handle extreme power while maintaining smooth engagement. Trusted by top racers and tuners worldwide, ACT sets the standard for high-performance clutch systems.

600140-03 is a flywheel kit for various Mazda RX-7 and RX-8 applications comes complete with an ACT counterweight. The flywheel counterweight is required when installing the XACT flywheel on various Mazda RX-7 and RX-8 rotary applications. XACT Prolite flywheels are ACT's lightest flywheel offering with lowest inertia. Prolite flywheels are designed for best throttle response and acceleration. Prolite flywheels are preferred for road racing or rally racing, and have reduced drivability. Materials are properly distributed for maximum strength, lower inertia, good heat tolerance and rigidity. XACT flywheels are serviceable and can be resurfaced with no need to purchase additional parts.

Warranty

Installation Instructions

This Part Fits:

Year	Make	Model	Submodel
2008	Mazda	RX-8	40th Anniversary Edition
2004-2007	Mazda	RX-8	Base
2008-2011	Mazda	RX-8	Grand Touring
2009-2011	Mazda	RX-8	R3
2005	Mazda	RX-8	Shinka
2008-2011	Mazda	RX-8	Sport
2008-2009	Mazda	RX-8	Touring