OS Giken SuperLock LSD, BMW Z3 M

OS Giken SuperLock LSD for BMW Z3 M – Precision Limited Slip Differential Upgrade

Enhance the performance and drivability of your BMW Z3 M with the OS Giken SuperLock LSD—a track-proven limited slip differential engineered for smooth, predictable engagement and superior traction under load.

This advanced LSD features OS Giken’s patented pressure ring system and spline-through-side-gear design, allowing up to twice the number of friction plates compared to standard differentials. That means quieter operation, stronger lock-up, and extended durability in both street and motorsport applications.

Perfect for spirited driving, track use, or replacing a worn factory LSD, the OS Giken SuperLock delivers a full 100% progressive lock without compromising daily drivability.

Key Features:

• Patented pressure ring design for progressive and responsive locking
• Spline-through-gear construction allows for increased friction plate count
• Low preload with 100% lock capability for ideal balance of comfort and performance
• All components chemically heat-treated for long-term strength
• Built from high-grade forged steel for unmatched durability
• Clutch discs precision-machined on both sides to reduce warpage and maintain consistency
• Billet-machined LSD case for structural uniformity and precise fitment

US Model Technical Specifications:

• Ramp Angles: 25 / 38
• Lock Timing: 336
• Total Friction Plates: 20
• Preload: 10S

EURO Model Technical Specifications:

• Ramps - 25 / 35
• Lock Timing - 336
• Total Plates - 20
• Preload - 10S

Vehicle Fitment:

• BMW Z3 M Coupe
• BMW Z3 M Roadster

Installation Notes:
Refer to the OEM BMW service manual. Professional installation is recommended to ensure proper fit and performance.