Cometic C5476-056 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 3.970

The Cometic C5476-056 is a high-performance Multi-Layer Steel (MLS) cylinder head gasket engineered specifically for GM LS Gen III and Gen IV small block V8 engines, including the LS1, LS2, LS3, and LS6 platforms. This gasket features a 3.970-inch bore diameter and .056-inch compressed thickness, making it ideal for stock and modified engines requiring reliable sealing under high-performance conditions.

Key Features:

• Multi-Layer Steel construction provides superior durability and reusability compared to traditional composite gaskets
• 3.970-inch bore diameter accommodates standard LS bore sizes
• .056-inch compressed thickness allows for precise compression ratio tuning
• Advanced MLS design distributes cylinder pressure evenly while maintaining excellent combustion sealing
• Embossed stainless steel layers with Viton rubber sealing beads provide optimal sealing across all engine surfaces
• Withstands extreme temperatures and cylinder pressures in high-boost and high-compression applications
• Compatible with Gen III engines (LS1, LS6) and Gen IV engines (LS2, LS3) with standard bore configurations

Cometic MLS gaskets are a preferred choice among engine builders and performance enthusiasts for forced induction, nitrous, and naturally aspirated builds where reliability and consistent sealing are critical. The multi-layer design conforms to imperfections in the deck surface while maintaining excellent cylinder sealing under extreme conditions.