COMP Cams 1.640 O.D. Spring Shims .635 I.D. .030 Thickness 42032BK and bottoming out through the

and bottoming out through the use of massive 7-inch

GM LT-Series

two 5/16" barbed fittings 1X 90 deg

1969-1985 Pontiac Firebird

GM / Tremec T56 Transmissions

COMP Cams 1.640 O.D. Spring Shims .635 I.D. .030 Thickness 42032BK and bottoming out through theEnsure the equal installed height of all of your valve springs with these 1. 640" outer diameter, . 030" thick, heat treated spring shims. Engine Valve Spring Shim Spring Shim, . 030 X 1. 640The COMP Cams philosophy has never changed: make the highest performing products possible and lead the industry in technological development. One thing COMP Cams has never forgotten: Performance is defined by what happens out on the race track. Because no matter