Cometic C5987-040 MLS Cylinder Head Gasket AMC Inline - 4.0L 6

The Cometic C5987-040 is a premium Multi-Layer Steel (MLS) cylinder head gasket engineered specifically for AMC 4.0L inline 6-cylinder engines. This high-performance gasket features a .040" (1.0mm) compressed thickness and 3.950" bore diameter, providing an excellent balance of sealing performance and reliability for both stock and modified applications.

Key Features:

• Multi-Layer Steel (MLS) construction for superior sealing and durability
• .040" compressed thickness allows for precise compression ratio tuning
• 3.950" bore diameter optimized for AMC 4.0L engines
• Embossed stainless steel layers with Viton rubber coating resist blowout
• Accommodates thermal expansion and cylinder head movement
• Reusable design for multiple installations when properly maintained
• Ideal for street performance, off-road, and mild boost applications

Cometic MLS head gaskets are trusted by engine builders worldwide for their proven ability to seal under extreme conditions. The multi-layer design consists of multiple layers of stainless steel with elastomeric coatings that compress and recover to maintain constant sealing pressure. This gasket is compatible with AMC 4.0L engines commonly found in Jeep Cherokee XJ, Wrangler YJ/TJ, and other applications from 1987-2006.