Felpro Steel Loc-Wire O-Ring Head Gasket (FE1012)

FE1012 - BB CHEV 396 454 O-RING 4.640"

Suit BB Chev, Suit Nitrous/Turbo Applications, 4.640" Bore, .039" Compressed Thickness, One Coolant Hole Per End

Part Number: FE1012

Loc Wire head gaskets require precision receiver groove machined in cylinder heads.
Round bore; Will not fit some cylinder head valve pockets
Fits Mark IV Block
Pre-1971 blocks may require modifications
Fits Gen V Block
Fits Gen VI Block
One coolant holes per end.
Three lower coolant holes
Has large .510" dia. bolt holes
Designed specifically for nitrous and high boost applications,

Loc-Wire head gaskets use an oversized combustion sealing wire encased in a stainless steel armour to provide an extremely robust combustion seal.