assault racing products v4101 big block chevy polished fabricated aluminum long bolt valve covers bbc 396 402 427 454 502 assault racing products <p>this is a new pair of big block chevy fabricated aluminum valve covers. fits 1966-2000 big block chevy 396, 402, 427, 454, and 502's. tall style - 3 1/4", will clear almost all valve train combinations. these have the outer bolts going through the top of the covers for more valvetrain clearance. includes valve cover bolts!</p><p>these are a fully tig welded aluminum cover. thick 1/4" billet rail. 1 1/4" baffled breather holes. requires a 1-1/4" od grommet.</p>