Cometic C10257 MLS Head Gasket Bore Compressed Thickness Gaskets & Seals - 4.320 040

The Cometic C10257 is a Multi-Layer Steel (MLS) head gasket engineered for high-performance and racing applications. This gasket features a 4.320-inch bore diameter and a compressed thickness of .040 inches, designed to provide superior sealing under extreme cylinder pressures and temperatures.

Key Features:

• Multi-Layer Steel construction for maximum durability and reusability
• 4.320-inch bore diameter for precise fitment
• 0.040-inch compressed thickness (40 thousandths)
• Compatible with 128 cubic inch displacement configurations
• Advanced coating technology provides excellent micro-sealing properties
• Designed to withstand high cylinder pressures in boosted and naturally aspirated engines
• Resistant to extreme temperatures and pressures

Cometic MLS head gaskets are the industry standard for performance engine builds, offering exceptional conformability to sealing surfaces while maintaining superior torque retention. The multi-layer design allows for slight movement between layers, accommodating thermal expansion and contraction while preventing combustion leak paths.