Cometic C5790-066 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 4.165

The Cometic C5790-066 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 LS1, LS2, LS3, and LS6 applications. This gasket features a .066" compressed thickness and is designed with a 4.165" bore diameter to accommodate engines equipped with Darton MID (Multiple Interlocking Design) sleeves.

Key Features:

• Multi-Layer Steel (MLS) construction provides superior sealing and durability under extreme cylinder pressures
• .066" (1.68mm) compressed gasket thickness for precise compression ratio tuning
• 4.165" bore diameter specifically sized for Darton MID sleeve applications
• Compatible with LS1, LS2, LS3, LS6, and other Gen III/IV LS small block V8 engines
• Engineered to withstand high-performance and forced induction applications
• Cometic's proven MLS technology ensures reliable head sealing in demanding racing and street environments

Cometic MLS gaskets are the preferred choice for engine builders working with modified and high-output LS engines. The multi-layer design allows for thermal expansion and contraction while maintaining consistent clamping pressure across the head surface. This gasket is ideal for stroker builds, sleeved engines, and turbocharged or supercharged applications where a precise bore size and gasket thickness are critical for achieving target compression ratios and reliable performance.