Cometic C5889-092 GM Small Block MLS Cylinder Head Gasket - LS7 Gen-4 V8

The Cometic C5889-092 is a multi-layer steel (MLS) cylinder head gasket engineered specifically for GM LS7 Gen-4 small block V8 engines with aftermarket sleeve installations. This precision gasket features a .092-inch compressed thickness and is designed for a 4.150-inch bore diameter, making it ideal for performance builds requiring oversized cylinders.

Key Features:

• Multi-layer steel (MLS) construction provides superior sealing and durability under high cylinder pressures
• .092-inch (2.34mm) compressed thickness for precise deck height control
• 4.150-inch bore diameter accommodates aftermarket sleeve installations
• Engineered specifically for GM LS7 Gen-4 small block V8 applications
• Embossed stainless steel layers with Viton rubber sealing beads ensure maximum sealing performance
• Resists blowout and gasket failure in high-performance and forced-induction applications

Cometic MLS head gaskets feature multiple layers of stainless steel with embossed sealing beads around combustion chambers, coolant passages, and oil return holes. This design allows the gasket to conform to minor surface imperfections while maintaining consistent clamping pressure. The MLS construction is particularly well-suited for aluminum heads on iron blocks, as it accommodates differential thermal expansion rates between dissimilar metals.

Important: This gasket is designed for aftermarket sleeved blocks only. Proper surface preparation (RA finish of 50-60 micro-inches) and torque specifications are critical for optimal performance.