Cometic C5489-140 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 4.100

The Cometic C5489-140 is a premium Multi-Layer Steel (MLS) cylinder head gasket engineered specifically for GM LS Gen III and Gen IV small block V8 engines, including LS1, LS2, LS3, and LS6 applications. This gasket features a 4.100-inch bore diameter and a compressed thickness of .140 inches (140 thousandths), making it ideal for both stock rebuilds and performance builds.

Key Features:

• Multi-Layer Steel construction provides superior sealing and durability under high cylinder pressures
• 4.100" bore diameter accommodates stock and mild overbore LS applications
• 0.140" compressed thickness allows for precise compression ratio tuning
• Embossed stainless steel layers with Viton rubber coating ensure excellent combustion sealing
• Compatible with LS1, LS2, LS3, LS6, and other Gen III/IV LS small block engines
• Designed to withstand extreme temperatures and pressures in performance applications

Cometic MLS gaskets are the choice of professional engine builders and racers worldwide. The advanced multi-layer design allows the gasket to adapt to minor surface imperfections while maintaining a reliable seal, even in high-boost or high-compression applications. Perfect for street performance, track, and racing engines.