Valve springs with larger diameters require retainers to handle the higher pressures developed by the springs. COMP Cams steel retainers are precision machined from 4140 chromemoly steel and finished in black oxide. These precision retainers are specifically designed for positive location when combined with COMP Cams high-quality valve springs. For superior strength and ultimate stability, both 7° and 10° retainers and valve locks are available. Refer to the spring application chart on pages 293-303 for correct retainer part numbers for each COMP Cams valve spring. PartNumber : cca774-1 Description : Steel Valve Spring Retainers; Single Piece Title : 774-1 Steel Retainers, for 26915 and 26 918 Spring Diameter 3 : N/A Angle : 7° Stem Size : 8 mm Diameter 2 : .640" Diameter 1 : 1.030" Diameter 4 : N/A Spring Diameter : 1.055" California Proposition 65 : WARNING: Cancer and Reproductive Harm P65Warnings.ca.gov Compatible Lock : 623-1 Diameter 1 : 1.03 Diameter 2 : 0.64 Lock Angle : 7 Retainer Material : 4140 Chromemoly Steel Valve Spring Diameter : 1.055 Valve Stem Size : 8 2004-2005 Cadillac CTS V V8.-cc Engine Components::Valve Springs, Retainers 2006 Cadillac CTS V V8.5967cc Engine Components::Valve Springs, Retainers 1998-2002 Chevrolet Camaro Z28 V8.-cc Engine Components::Valve Springs, Retainers 1998-2002 Chevrolet Camaro Z28 SS V8.-cc Engine Components::Valve Springs, Retainers 2003 Chevrolet Corvette 50th Anniversary Edition V8.-cc Engine Components::Valve Springs, Retainers 2003 Chevrolet Corvette 50th Anniversary Edition Pace Car V8.-cc Engine Components::Valve Springs, Retainers 1997-2005 Chevrolet Corvette Base V8.-cc Engine Components::Valve Springs, Retainers 2006 Chevrolet Corvette Base V8.5967cc Engine Components::Valve Springs, Retainers 1998 Chevrolet Corvette Indianapolis 500 Pace Car V8.-cc Engine Components::Valve Springs, Retainers 2001-2004 Chevrolet Corvette Z06 V8.-cc Engine Components::Valve Springs, Retainers 2006 Chevrolet Impala SS V8.5328cc Engine Components::Valve Springs, Retainers 2006 Chevrolet Monte Carlo SS V8.5328cc Engine Components::Valve Springs, Retainers 2005-2006 Chevrolet SSR Base V8.-cc Engine Components::Valve Springs, Retainers 2005-2006 Chevrolet SSR Base V8.5967cc Engine Components::Valve Springs, Retainers 2006 Chevrolet Trailblazer SS V8.5967cc Engine Components::Valve Springs, Retainers 1998-2002 Pontiac Firebird Formula V8.-cc Engine Components::Valve Springs, Retainers 1998-2002 Pontiac Firebird Trans Am V8.-cc Engine Components::Valve Springs, Retainers 2005-2006 Pontiac Grand Prix GXP V8.5328cc Engine Components::Valve Springs, Retainers 2004 Pontiac GTO Base V8.-cc Engine Components::Valve Springs, Retainers 2005-2006 Pontiac GTO Base V8.5967cc Engine Components::Valve Springs, Retainers