BMW F82 F87 F80 LSD Upgrade - OS Giken

OS Giken Super Lock LSD for BMW F80 M3/ F87 M2/ F82 M4

Overview
Upgrade your F8X drivetrain with the OS Giken Super Lock Limited-Slip Differential (LSD)—a purpose-built, racing-grade diff designed to deliver unwavering traction, smoother performance, and aggressive gearing response.

Key Features & Benefits

• 100% progressive locking ensures maximum power is transmitted efficiently to the road while maintaining smooth operation.

• Advanced design includes up to 28 friction plates and a patented lock timing system, delivering enhanced locking force, heat dissipation, and durability.

• Quiet and seamless engagement, offering both race-capable restraint and street-level refinement—no chattering or harsh transitions.

• Extremely rugged construction, featuring high-grade steel, precision machining, and forged internals, with absolutely no break-in required.

• Fully tunable—adjust preload, lock timing, and ramp angles to match your driving style, from daily-driven street cars to full-blown track setups.

Fitment

• Compatible with the BMW F80 M3, as well as other F8X models (F82 M4, F87 M2), replacing the electronically controlled stock diff

• Installation requires professional service—this is a “chunk” replacement and retains your original ring & pinion gear.

Why Choose OS Giken for Your F8X?
This is not a mere upgrade of OEM hardware—it’s a full re-engineering from the ground up, built for motorsport performance with real-world reliability. Whether you're after better track lap times, smoother drift transitions, or refined street performance, the OS Giken is a significant leap forward over stock or Quaife-style diff units.

Please talk to us about installation into your diff housing. Core exchange units available!