4.320 MLS Head Gasket .027 - BBC

The 4.320 MLS Head Gasket .027 - BBC from Cometic Gaskets is a precision-engineered sealing component designed for big-block Chevrolet engines demanding maximum reliability and performance. This multi-layer steel (MLS) gasket is ideal for serious engine builders and performance enthusiasts who prioritize head gasket integrity during high-horsepower builds, race applications, or heavily modified street engines.

Constructed from multi-layer steel, this gasket offers superior sealing surface durability and thermal stability compared to traditional composite gaskets. Its .027-inch compressed thickness is precisely engineered to maintain proper combustion chamber volume and ensure accurate ignition timing when used with matching cylinder head deck surfaces. Cometic's proprietary coating technology enhances clamping force distribution across the gasket face, reducing the risk of hot-spot failures and coolant migration.

This gasket is essential for BBC (big-block Chevrolet) engine platforms, including 396, 427, and 454 variants, and is particularly beneficial for applications involving forced induction, nitrous oxide systems, and high-compression builds that generate extreme cylinder pressures. With its robust design, the 4.320 MLS Head Gasket .027 - BBC is a reliable choice for anyone looking to enhance engine performance and longevity.