Cometic C5921-030 GM LSJ Ecotec MLS Cylinder Head Gasket Bore - Gen-1 87mm

The Cometic C5921-030 is a precision-engineered multi-layer steel (MLS) cylinder head gasket designed specifically for GM LSJ Gen-1 Ecotec engines. This high-performance gasket features a .030" (0.76mm) compressed thickness and an 87mm bore diameter, providing an optimal seal between the cylinder head and engine block.

Key Features:

• Multi-layer steel construction for superior sealing and durability
• .030" compressed thickness for precise compression ratio tuning
• 87mm bore diameter engineered for LSJ Ecotec applications
• Embossed stainless steel outer layers with expanded graphite facing
• Designed to withstand high cylinder pressures in forced induction applications
• Eliminates leak paths and withstands extreme temperature cycling

Cometic MLS gaskets utilize multiple layers of stainless steel with advanced coating technology to create a superior seal that rebounds under extreme conditions. The embossed layers provide multiple sealing points while allowing the gasket to move with the cylinder head and block during thermal expansion. This gasket is ideal for GM LSJ engines found in applications like the Chevrolet Cobalt SS, Saturn Ion Redline, and other turbocharged Ecotec platforms.