Description
Manley Severe Duty Exhaust Valve 1.880 in Head 0.342 in Valve Stem 5.422 in Long Big Block Chevy 42045 dual flange headers on Small With Steam HolesSince 1989 Size:Small (55) EAS21974 WM485MD dual flange headers on Small Block Chevy engines The single largest contributing factor to fuel economy on your vehicle is the