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 : cca783-100 Description : Steel Valve Spring Retainers; Bulk, 100 Pieces Title : 783-100 Steel Retainers, EB LS1 "Stocker" Spring Diameter : 1.215" Stem Size : Stock Diameter 4 : — Diameter 3 : — Diameter 1 : 1.030" Diameter 2 : .610" Angle : 7° 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 1997-2002 Chevrolet Corvette Base V8.-cc Engine Components::Valve Springs, Retainers 1998 Chevrolet Corvette Indianapolis 500 Pace Car V8.-cc Engine Components::Valve Springs, Retainers 2001-2002 Chevrolet Corvette Z06 V8.-cc 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