Seller notes

Fits 1965-1990 Chevrolet 396-454 Mark IV Big Block. Round Ports, 2.15 InchHas A Graphite Core W/ Steel Outer Layers; Graphite Core Has Excellent Thermo-conductivity; Coated With High Temp Silicone For Sealing; Will Not (brindle ) Or Indent Aluminum Heads;...

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