Competition Clutch Ultra Lightweight Steel Flywheels (STU suffix) are recommended for forced induction and/or track and rally racing applications. This flywheel is machined with less material to assist in quicker revving capabilities. Well-suited for Stage 3 and up clutch applications. Made of 4140 forged steel and are a one-piece design. All flywheels are SFI certified. Not all applications have the ST and STU versions available. Flywheel weights vary from 8lbs to 18lbs depending on application.
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This Part Fits:

Year	Make	Model	Submodel
1993-1995	Mazda	RX-7	Base
1993	Mazda	RX-7	R1
1994-1995	Mazda	RX-7	R2
1993-1995	Mazda	RX-7	Touring
1989-1991	Mazda	RX-7	Turbo
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