Head Gasket- SBF 4.100in Bore

The FEL-PRO Head Gasket for Small Block Ford 4.100in Bore is a cylinder head gasket engineered for precision engine sealing on small block Ford applications. This gasket features a 4.100-inch bore diameter with 0.045-inch compression thickness and uses PTFE-coated fiber construction to deliver reliable sealing performance across a wide range of operating temperatures and pressures. FEL-PRO remains one of the most recognized manufacturers of OEM-quality gaskets for domestic engine rebuilds and performance applications.

The PTFE coating on this cylinder head gasket provides superior durability and chemical resistance compared to uncoated fiber materials. The 0.045-inch compression thickness is critical for maintaining proper combustion chamber volume and compression ratio in Small Block Ford engines. This specification ensures the gasket seats correctly against both the cylinder head and block surface, preventing coolant leakage, oil migration, and combustion gas bypass. The gasket's fiber core combined with the PTFE treatment allows it to withstand repeated thermal cycling without degradation or premature failure.

This gasket is designed for engine rebuilds, overhauls, and performance modifications on Small Block Ford platforms, including street engines, race applications, and high-mileage restorations. Whether you're replacing a failed gasket on a vintage 289 or 351W engine or building a fresh long-block assembly, this component ensures proper cylinder head-to-block sealing from initial startup through thousands of operating hours. The 4.100-inch bore specification is compatible with standard SBF casting variations and common aftermarket cylinder head options.

Small Block Ford head gaskets must meet exacting specifications because the cylinder head fastening pattern, bore diameter, and sealing surfaces vary across decades of production. Using the correct bore size ensures even clamping force distribution and eliminates hot spots that lead to gasket failure. FEL-PRO's long manufacturing history in this segment reflects the critical role quality gaskets play in engine longevity and reliability.

Each unit arrives ready for installation and includes all gasket material necessary for one cylinder head seal. Proper torque sequencing and head bolt specifications for your specific engine are essential during installation to maximize gasket life and performance.