Cometic C9992-030 Revolution 4.375" MLS Head & Base Gasket Kit

The Cometic C9992-030 Revolution gasket kit provides a complete top-end sealing solution for 4.375" bore big bore applications. This kit includes both Multi-Layer Steel (MLS) head gaskets and composite base gaskets engineered for high-performance and racing engines.

Key Features:

• 4.390" actual bore diameter (.040" overbore from 4.375" standard)
• .040" thick MLS head gasket for superior combustion sealing
• .020" thick composite (RC) base gasket for thermal expansion management
• Multi-Layer Steel construction with embossed stainless steel layers
• Designed for high-compression and forced-induction applications
• Superior rebound characteristics compared to traditional gaskets
• Excellent resistance to extreme temperatures and pressures

Cometic's Revolution gasket line combines the proven durability of MLS technology with precision-engineered base gaskets to deliver reliable sealing in demanding performance environments. The MLS design features multiple layers of stainless steel with polymer coatings that conform to sealing surfaces while maintaining consistent clamping pressure across the entire bore.