Manley Valve Spring Retainers are engineered using finite element analysis and CNC machined to exacting tolerances to deliver unmatched strength and performance. These retainers reduce valvetrain mass, improve RPM potential, and ensure superior valve control in the most demanding racing applications.

This Part Fits:

Year	Make	Model	Submodel
1987-1990	Chevrolet	Camaro	Iroc-Z
1991-1992,1998-2002	Chevrolet	Camaro	Z28
1988	Chevrolet	Corvette	35th Anniversary Edition
1985-1992,1997-2004	Chevrolet	Corvette	Base
1986	Chevrolet	Corvette	Indianapolis 500 Pace Car
1990-1992	Chevrolet	Corvette	ZR-1
1987-1988	Pontiac	Firebird	Base
1989-1992,1998-2002	Pontiac	Firebird	Formula
1987-1992	Pontiac	Firebird	Trans Am
1989-1992	Pontiac	Firebird	Trans Am GTA
2004	Pontiac	GTO	Base