Main Cap Bolt LS Series Inner 6-Bolt

The Chevrolet Performance Main Cap Bolt LS Series Inner 6-Bolt is an OEM-spec fastener engineered for LS and LT engine block assembly. This critical component secures the main bearing cap to the engine block, ensuring proper crankshaft alignment and load distribution under extreme combustion pressures. Whether you're rebuilding a stock LS engine, upgrading a performance platform, or restoring a classic with modern LS power, this bolt is non-negotiable for achieving factory reliability and durability standards.

Manufactured to Chevrolet Performance specifications, the Main Cap Bolt LS Series Inner 6-Bolt is precision-engineered from high-strength steel with precise threading to maintain consistent clamping force across all bearing surfaces. The 6-bolt configuration distributes stress evenly, preventing micro-movement that can lead to bearing wear, oil starvation, or catastrophic engine failure. Unlike aftermarket substitutes, OEM Chevrolet Performance fasteners undergo rigorous tensile and torque testing to guarantee compatibility with factory torque specifications and harmonic damper loads inherent to LS powerplants.

This fastener is essential for anyone performing a full engine rebuild, transmission swap, or performance machine work on LS-platform vehicles. Mechanics and enthusiasts trust Chevrolet Performance original equipment components because they eliminate guesswork in critical engine assembly procedures. When torquing main cap bolts, use a calibrated torque wrench and follow factory specifications—typically 15 ft-lbs for initial pass plus 90-degree rotation for final torque. Always replace fasteners during teardown rather than reusing; proper clamping load is non-negotiable for engine longevity. For optimal results, pair this bolt with new main bearings, gaskets, and seals during complete machine work.