Providing the best sealing properties and spring clearance, viton valve seals are an excellent choice in performance applications. The 511 seal has a .600" OD and fits LS applications with 8mm valves and .500" OD guides.

This Part Fits:

Year	Make	Model	Submodel
2004-2007	Cadillac	CTS	V
1998-2002	Chevrolet	Camaro	Z28
1998-2002	Chevrolet	Camaro	Z28 SS
2003	Chevrolet	Corvette	50th Anniversary Edition
2003	Chevrolet	Corvette	50th Anniversary Edition Pace Car
1997-2007	Chevrolet	Corvette	Base
1998	Chevrolet	Corvette	Indianapolis 500 Pace Car
2001-2004	Chevrolet	Corvette	Z06
2006-2007	Chevrolet	Impala	SS
2006-2007	Chevrolet	Monte Carlo	SS
2005-2006	Chevrolet	SSR	Base
2006	Chevrolet	Trailblazer	SS
1998-2002	Pontiac	Firebird	Formula
1998-2002	Pontiac	Firebird	Trans Am
2005-2007	Pontiac	Grand Prix	GXP
2004-2006	Pontiac	GTO	Base