4.350 MLS Head Gasket .027 - BBM

The 4.350 MLS Head Gasket .027 - BBM by Cometic Gaskets is a precision-engineered sealing solution designed for Mopar B and RB-Series big block engines. As a critical component in high-performance engine assembly, this multi-layer steel (MLS) gasket is built to withstand the extreme cylinder pressures common in modified street and competitive racing applications. By utilizing advanced materials, Cometic ensures that your engine maintains combustion chamber integrity under the most demanding thermal conditions.

Featuring a 4.350-inch bore diameter, this gasket is specifically tailored for large-bore Mopar powerplants. The multi-layer steel construction consists of several layers of stainless steel, which offer superior recovery and rebound characteristics compared to traditional composite materials. This design allows the gasket to maintain a consistent seal even as the cylinder head and block undergo thermal expansion and contraction during intense operation cycles.

The 0.027-inch compression thickness is a vital specification for engine builders looking to optimize the quench distance and compression ratio. A thinner gasket like this can significantly improve combustion efficiency, provided that the piston-to-head clearance is precisely calculated. Whether you are performing a top-end refresh or a complete performance overhaul, these specifications provide the professional-grade fitment required for the Big Block Mopar platform.

When you buy this Cometic head gasket, you are choosing a component recognized for its durability and resistance to blowout. These gaskets are sold individually, allowing for precise ordering based on your specific build requirements. For those reviewing specifications for a reliable Mopar B/RB-series build, the C5460-027 delivers the technical precision and reliability required to meet modern performance standards.