Although the FX725 features minimal rotational mass

designed specifically for M50

- High-quality components for a long-term durability

Built for aggressive camshafts and high-performance applications

Email-based technical support

OS Giken SuperLock LSD, BMW E39 M5 4275 Although the FX725 features minimalOS Giken SuperLock LSD for BMW E39 M5 Track Ready Limited Slip Differential with Street Comfort Upgrade the rear differential of your BMW E39 M5 with the OS Giken SuperLock LSDdesigned for smooth, progressive engagement and uncompromising traction. This performance differential features OS Gikens exclusive pressure ring technology and a spline through side gear construction that accommodates up to twice as many friction plates as conventional LSDs.