SBC Billet Front Main Cap

The SBC Billet Front Main Cap from Howards Racing Components is engineered for small-block Chevrolet engines requiring precision-machined internal components that exceed OEM durability standards. Built for both street performance and race applications, this front main cap serves as the critical bearing surface that supports your crankshaft under high loads and sustained RPM. Whether you're rebuilding a 350 with upgraded internals or assembling a competition engine, a quality billet main cap is non-negotiable for reliability and consistent performance.

Machined from premium billet aluminum, the H350F cap eliminates the porosity and inconsistencies found in cast iron OEM components, resulting in superior concentricity and bearing alignment. The billet construction allows for tighter tolerances and improved oil flow characteristics essential when running high-performance gaskets and upgraded main bearing sets. Proper main cap geometry is fundamental to crankshaft runout control—even minor misalignment compounds vibration and accelerates bearing wear, making this component's precision critical to engine longevity and power delivery.

This front main cap is compatible with small-block Chevrolet 350 engines and must be properly torqued to specification and honed to ensure correct bearing clearances during final assembly. It integrates seamlessly into complete engine builds, stroker conversions, and high-displacement variants where maximizing internal structural integrity is paramount. Professional machine shops and serious enthusiasts select billet main caps when investing in forged crankshafts and performance bearing packages, as the component payoff directly translates to reduced parasitic losses and increased engine reliability under sustained boost, nitrous, or naturally aspirated high-RPM operation.