Steel Pre-Flattened O-Ring Head Gasket Suit SB Chev 400, 4.250" Bore, .051" Compressed Thickness

• Extra thick to reduce compression and correct valve to piston clearance
• Extra large bore
• Can be used on 400 race engines

Fel-Pro wire ring head gaskets, with a stainless steel combustion armour, proprietary-coated composite facing material and a solid steel core deliver and unbeatable combination of quality, capability and value making them the single best choice for the vast majority of racing and street performance engines.