BB Chevy Head Gasket 4.540in Bore

The FEL-PRO BB Chevy Head Gasket 4.540in Bore (MPN 1017-1) is a cylinder head gasket engineered for Big Block Chevrolet engines requiring precise compression sealing. This gasket features a 0.039-inch compression thickness with a steel core laminate construction, delivering the seal integrity demanded in high-performance and restoration engine builds where cylinder head-to-block interface reliability is non-negotiable.

The steel core laminate design provides superior gasket strength and thermal stability compared to softer elastomer-only gaskets, critical for engine configurations running sustained higher pressures or temperature cycling. The 4.540-inch bore specification ensures proper sealing around all combustion chambers without overhang or edge exposure that would compromise head gasket longevity. FEL-PRO gaskets meet OEM sealing standards and are manufactured to precise tolerances that eliminate the guesswork during engine reassembly, whether you're rebuilding a stock engine or a modified stroker setup.

This gasket is the correct choice for engine builders, restoration professionals, and experienced enthusiasts performing Big Block Chevy head work. Proper installation requires clean deck surfaces, correct fastener torque sequencing, and adherence to engine builder specifications. A quality head gasket is foundational to engine reliability—choosing the correct bore size and compression rating prevents costly coolant seepage, combustion gas bypass, and catastrophic internal leaks that compromise engine longevity.

Each gasket ships as a single unit ready for installation. When sourcing replacement or original gaskets for Big Block Chevy applications, accurate bore diameter and compression thickness specification matching is essential—this part number 1017-1 is engineered specifically for the 4.540-inch bore dimension and cannot be substituted with larger or smaller bore gaskets.