BBC Pin Lock .787 x 1.3mm wo/Tang Clip

The BBC Pin Lock .787 x 1.3mm wo/Tang Clip is a precision piston pin retention component engineered for high-performance engine builds and motorsports applications. Manufactured by MAHLE PISTONS—a trusted OEM supplier serving professional mechanics, engine builders, and military vehicle maintenance teams—this pin lock ensures secure piston pin retention under extreme combustion pressures and thermal cycling. The absence of a tang clip design reduces assembly complexity while maintaining critical holding force, making it ideal for custom engine platforms and performance rebuilds where reliability cannot be compromised.

This BBC pin lock features precision-machined dimensions of .787 x 1.3mm, calibrated to provide maximum interference fit and axial retention without the additional stress points introduced by traditional tang clips. The pin lock design distributes clamping force evenly across the piston bore, reducing micro-movement that can accelerate wear and fatigue failure during extended high-load operation. Weighing just 0.01 lbs, this lightweight component contributes negligibly to rotating assembly inertia while delivering MAHLE's engineered tolerances—the same standard applied to military-spec and heavy-duty applications. The symmetrical profile ensures repeatable installation and eliminates directional confusion during engine assembly.

Professional engine builders, motorsports technicians, and military vehicle maintenance personnel rely on MAHLE pin locks to guarantee piston pin stability during sustained high-RPM and high-boost scenarios. This component is essential for big-block Chevrolet (BBC) platforms and compatible engine families requiring .787-diameter pin bores. Proper installation requires careful bore cleaning and precise sizing—any debris or undersized bore will compromise retention and risk catastrophic engine failure. Always pair this pin lock with OEM or equivalent piston pins and ensure bore dimensions fall within manufacturer specifications before installation.