VALVE COVER ADAPTER Pontiac Valve Covers on Oldsmobile Heads ... Pontiac (326, 350, 389, 400, 455) Valve Covers on Oldsmobile (330, 350, 403, 400, 425, 455) Heads Includes stainless steel bolts and washers  SOLD IN SETS (Two Adapters) Made in the U.S.A. from 100% U.S.A. Billet Aluminum Buy Now