Cometic C5477-066 GM MLS Cylinder Head Gasket Bore - LS1/LS2/LS3/LS6 4.000

The Cometic C5477-066 is a high-performance Multi-Layer Steel (MLS) cylinder head gasket engineered specifically for GM LS Gen-3 and Gen-4 small block V8 engines, including LS1, LS2, LS3, and LS6 applications. This gasket features a 4.000-inch bore diameter and a compressed thickness of .066 inches, providing an excellent balance of sealing performance and compression ratio control.

Key Features:

• Multi-Layer Steel (MLS) construction for superior sealing and durability
• 4.000-inch bore diameter designed for standard and performance LS builds
• .066-inch compressed thickness for precise compression ratio tuning
• Compatible with LS1, LS2, LS3, and LS6 Gen-3/Gen-4 small block V8 engines
• Engineered to withstand high cylinder pressures and extreme temperatures
• Viton rubber gasket material embossed into stainless steel for maximum sealing

Cometic MLS head gaskets are the choice of professional engine builders and performance enthusiasts for their proven ability to maintain a reliable seal in both street and racing applications. The multiple layers of stainless steel with integrated sealing beads provide excellent recovery characteristics and resistance to blowout, even under boosted or high-compression conditions.