Pro Copper Head Gasket - 4.200" Bore, .043" Thick SCE-P112043

Pro Copper Head Gasket - 4.200" Bore, .043" Thick P112043 SCE-P112043 Suit S/B Chev CHEVROLET SB 4.200 x .043 PRO Pro-Copper Head Gaskets

Not all solid copper gaskets are created equal. SCE uses premium 99% pure copper sheets rolled to our specifications (choice of 12 different thicknesses) and tested for uniform flatness to assure precise cylinder head-to-block alignment and eliminate uneven loading. After processing, each gasket is annealed to ensure optimum mating and provide measurable gains in-cylinder sealing, as evidenced by lower leak-down percentages. O-ringing recommended.