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TA Performance assembled Stage I aluminum cylinder head pair for Buick 430 and 455 models.
Part Number: STAGE1A
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TA Performance assembled Stage I aluminum cylinder head pair for Buick 430 and 455 models.
Pair of fully assembled heads features swirl polished one-piece valves with 3/8" backcut chrome stems and stalite tips, bronze guides, dual valve springs capable of .600" lift, chromemoly steel retainers, heat-treated locks, hardened shims with teflon guide seals and a competition-quality valve job. With 65-67cc high-swirl chambers and CNC ports, these heads flow 270-80 cfm intake/190-200 exhaust @ .500" lift right out of the box. Mild porting nets 300/214 and full porting 335/240. Weighs 60 lbs. less than stock heads.
-Uses stock manifolds, brackets, head bolts and accessories.-Has provisions for 4 additional head bolts for better sealing.-Use TA Performance paper-style intake gaskets, #TA1710.-Only recommended for 455 or overbored 430 engines.This product is discount exempt.
