Unlike most other Chevy V-8’s, the LS-series engines utilize individual O-rings around each port to seal the intake manifold to cylinder head. The LS1 / LS2 / LS6 style heads & manifolds use GM pn# 12533587 and the LS3 / L76 / L92 style heads use GM pn# 1290125.
Revolution Bare Cylinder Head S64205; 205cc Aluminum 64cc Straight Plug for SBC
$289.86
Alum Pontiac 400 455 215cc 72cc Ram Air IV Assembled Heads Hydraulic Flat Tappet
$1,975.00
Chevy GM LS1 LS2 LS6 190cc 60cc Aluminum Bare Cylinder Head
$368.11
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