Competition Clutch Lightweight Steel Flywheels (ST suffix) are recommended for naturally aspirated and/or street driven applications. This flywheel preserves low-end torque and driveability. Well-suited for Gravity, Stage 1 and Stage 2 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
2003-2007	INFINITI	G35	Base
2004-2006	INFINITI	G35	X
2005	Nissan	350Z	35th Anniversary Edition
2003-2006	Nissan	350Z	Base
2003-2006	Nissan	350Z	Enthusiast
2005-2006	Nissan	350Z	Grand Touring
2003-2005	Nissan	350Z	Performance
2003-2006	Nissan	350Z	Touring
2003-2006	Nissan	350Z	Track