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.
Birds are the exclusive worldwide distributor for BMW and Mercedes Quaife ATB Differentials.
Birds B-Series Suspensions include specially valved Bilstein shock absorbers and accompanying bespoke Eibach springs, designed to improve ride and handling on U.K roads.
Birds are a family-owned BMW tuning company and independent specialist based in South Bucks, UK.
Established in 1985, we are experts in BMW performance tuning, diagnostics and repairs, and routine servicing for BMWs classic and new.
We are internationally recognised for our affiliation with German tuner Hartge during the 80s/90s, and more recently for our exclusive agreement to distribute Quaife ATB Differentials worldwide.
The B1 Dynamics Package is a combination of three Birds-exclusive performance upgrades designed to transform the chassis of the BMW 1 Series.
It includes the Quaife ATB Limited-Slip Differential, the B1 Sport Suspension upgrade, and the B1 Anti-Roll Bar Kit. This package is available for all BMW E87 and E82 1 series variants, most popularly the 130i and 135i.
The B3 Dynamics Package is a combination of three Birds-exclusive performance upgrades designed to transform the ride quality, handling performance and traction on UK roads.
The package includes the famous Quaife ATB Limited-Slip Differential, the B3 Sport Suspension upgrade, and the B3 Anti-Roll Bar Kit. This package is available for all BMW E9x 3 series variants, most popularly the 335i and 335d.
To find upgrades select your BMW model below, or go directly to the Store
Welcome to Birds - the U.K's Premier BMW Tuning Company. In a market awash with 'specialists', we are proud to stand apart. Our position as representatives for some of the world's premier BMW tuning brands generates its own credibility, but as a company firmly routed in performance engineering, our reputation goes way beyond the products we sell.
Our Database contains thousands of fully tested and guaranteed elements that can turn your car into the Ultimate BMW Performance machine. Link here.
