OS Giken 72-88 Porsche 915/930 (MT Only) Super Lock LSD

The OS Giken Super Lock LSD uses a patented pressure ring design for smooth, progressive locking. Its spline-through-side-gear design allows for up to twice as many friction plates as competitors. Components are chemically heat-treated, constructed from high-grade steel alloy, and feature raw-forged gears for strength. Clutch disks are precision-machined to minimize warpage, and the LSD case is machined from a single billet piece. The standard OS LSD specification provides low preload while maintaining fully progressive 100% lock capability, offering quiet operation and smooth, predictable locking for enhanced driving and everyday drivability.