Cometic C5036-040 MLS Cylinder Head Gasket Chevy Big Block Mark IV Bore - for 4.570

The Cometic C5036-040 is a high-performance Multi-Layer Steel (MLS) cylinder head gasket engineered specifically for Chevrolet Mark IV Big Block V8 engines with a 4.570" bore diameter. This gasket features a compressed thickness of .040" (1.02mm), making it ideal for performance builds requiring precise deck height and compression ratio control.

Key Features:

• Multi-Layer Steel (MLS) construction provides superior sealing and durability under extreme cylinder pressures
• 4.570" bore diameter accommodates standard and slightly over-bored Mark IV engines
• .040" compressed thickness allows fine-tuning of compression ratios and deck height
• Engineered for high-performance and racing applications where reliability is critical
• Accommodates thermal expansion and contraction better than traditional composite gaskets
• Compatible with aluminum and cast iron cylinder heads

Cometic's MLS gaskets are a proven choice for serious engine builders, offering exceptional resistance to blowouts and combustion leakage. The multiple layers of stainless steel with elastomeric coatings conform to surface imperfections while maintaining consistent clamping force. Proper surface preparation (RA finish of 50-60 recommended) and torque specifications are essential for optimal performance.