Cometic GM SB2.2 Small Block V8 .030in MLS Cylinder Head Gasket - 4.150in Bore - With Steam Holes 1980-gmc-jimmy-sierra-grande-esi3231402 Each of these Cat-Back(tm) options

Each of these Cat-Back(tm) options (including the V6 system) comes complete with a merge X-Pipe for increased flow and richer sound

or towing heavy loads

the cowl-pass-through system eliminates the need for permanent modifications

Dyno tested to 874rwhp

it ensures a secure fit and enhanced strength

Cometic GM SB2.2 Small Block V8 .030in MLS Cylinder Head Gasket - 4.150in Bore - With Steam Holes 1980-gmc-jimmy-sierra-grande-esi3231402 Each of these Cat-Back(tm) optionsThe HP shim technology increases clampload around the combustion chamber, thereby increasing the sealability of the head gasket around the open deck block. The embossed outer layers of the gaskets meet the demands of a variety of harsh sealing environments, load conditions, and surface finishes The center or shim layer is an uncoated stainless steel layer which can be varied to accommodate multiple thickness requirements Requires less clamp load