SBC MLS Head Gasket 4.200in Bore .071in

The FEL-PRO SBC MLS Head Gasket 4.200in Bore .071in is the foundation of reliable small block Chevy combustion sealing, engineered for builders and mechanics who demand repeatability and durability in high-performance applications. This multi-layer steel head gasket serves as the critical barrier between cylinder head and engine block, containing compression and preventing coolant or oil cross-contamination. Whether you're rebuilding a street engine, refreshing a tired 350, or assembling a modified short-block platform, this gasket delivers the performance-grade sealing that separates amateur work from professional results.

Multi-layer steel (MLS) gasket construction provides superior conformability to head and block surfaces compared to traditional solid gaskets, accommodating minor surface irregularities while maintaining a consistent 0.071-inch compression thickness that ensures proper combustion chamber volume and ignition timing accuracy. The 4.200-inch bore specification matches common small block Chevy configurations, while the engineered material layers resist blowout under sustained boost or high cylinder pressure—critical for turbocharged, supercharged, or high-compression builds. FEL-PRO's quality control and OEM-equivalent manufacturing mean you'll see repeatable seal integrity across engine break-in and through thousands of miles of operation.

This gasket is ideal for small block Chevy rebuilds ranging from 262 to 400 cubic inch engines, particularly those with aluminum or ported/modified heads where surface finish variation demands the conformability of multi-layer design. Installation requires clean, properly torqued head bolts in the correct sequence—treat the gasket surface prep as seriously as the gasket itself for maximum longevity. The 1.06-pound weight indicates a standard single gasket; order one per engine rebuild or refresh. Trusted by professional machine shops and experienced home builders alike, the FEL-PRO SBC MLS Head Gasket 4.200in Bore .071in is the dependable choice for engines that need to stay sealed.