Cometic C9992 Revolution MLS Head & Base Gasket Kit 4.390" Bore .040" .020" RC

The Cometic C9992 Revolution gasket kit provides a complete multi-layer steel (MLS) sealing solution for high-performance engines with a 4.390-inch bore. This kit includes both head and base gaskets engineered with Cometic's advanced MLS technology for superior sealing under extreme cylinder pressures and temperatures.

Key Specifications:

• Actual bore diameter: 4.390 inches (advertised as 4 3/8")
• Head gasket thickness: .040 inch (40 thousandths) compressed
• Base gasket thickness: .020 inch with rubber coating (RC)
• Multi-layer steel construction for maximum durability
• Revolution series design for racing and performance applications

Features and Benefits:

• MLS technology provides multiple layers of stainless steel with elastomeric coatings for superior sealing
• Handles extreme cylinder pressures found in supercharged, turbocharged, and high-compression engines
• Rubber-coated base gasket ensures reliable oil-tight seal
• Precision-cut for accurate fitment on 4.390-inch bore engines
• Designed to eliminate gasket failure in high-performance and racing environments

This gasket kit is ideal for engine builders seeking maximum reliability in demanding applications where stock gaskets cannot survive. The Revolution series represents Cometic's premium gasket technology developed through decades of motorsports experience.