Video - Birds E92 335i with Quaife limited slip diff - Chris Harris

Watch BBC Top Gear presenter Chris Harris demonstrate the Quaife ATB's capabilities in our E92 335i!

The Quaife ATB Differential provides significantly improved traction and handling for powerful rear-wheel drive BMW and Mercedes cars.

Once installed, drivers will notice an immediate difference as the Quaife automatically biases torque across the axle to the wheel with most grip. Unwanted wheel-slip is greatly reduced, enabling drivers to exploit the full potential of their machines for the first time, leading to a more exciting, rewarding and rapid driving experience.

Widely regarded as the differential upgrade of choice for road car owners, the Quaife ATB was designed to overcome the flaws of conventional clutch-plate limited-slip diffs. Quaife's patented design;

offers a progressive deployment of power, allowing rear-wheel drive cars to become more controllable during moments of oversteer.
is silent and smooth in operation.
requires no maintenance, never wears, and is backed by a limited lifetime warranty.

Importantly, the Quaife works perfectly with all standard components and electronics, and therefore will not invalidate the manufacturer's warranty.