Established in 1965 Quaife are World leaders in the design and manufacture of driveline and steering rack components, specialising in both motorcycle and car components. As well as numerous other transmission and upgrade parts for road, race and rally cars, also the home of the world-renowned  Quaife Automatic Torque Biasing Helical LSD differential .

BMW 325i E30 Quaife ATB Helical LSD differential Product code: QDF2N Catalogue Page: 4 Manufacturers: BMW   Quaife ATB Helical LSD differential for BMW 325i E30 is suitable for BMW 325i models in model year E30. A direct replacement for the standard BMW open differential, the Quaife ATB Helical LSD differential transforms your car’s performance. Unlike a conventional plate-style limited slip differential, the BMW 325i E30 Quaife ATB Helical LSD differential relies on gears rather than clutch plates for its operation. That means it is much smoother in operation. The BMW 325i E30 Quaife ATB Helical LSD differential never locks harshly with a set pre-load of wheel slip across the driven axle, like a conventional LSD. Rather, the BMW 325i E30 Quaife ATB Helical LSD differential automatically biases the torque away from the spinning wheel across the axle, to a constantly varying degree, and never locks. The BMW 325i E30 Quaife ATB Helical LSD differential has many benefits over a standard open differential, including maximising traction and minimizing wheelspin, eliminating torque steer and snatching in front wheel drive cars compared to conventional LSD units, and a maintenance-free design which retains the standard oil lubrication. The BMW 325i E30 Quaife ATB Helical LSD differential is proven in circuit and drag racing, rallying and road use, and is produced from Corus steel billets, and is CAD designed and CNC machined, then inspected to ISO 9001 standards. With over 170 applications, the Quaife ATB Helical LSD differential is second to none. Accept no imitations! Quaife ATB Helical LSD differentials are used by Ford, General Motors and Daimler-Chrysler as original equipment. The Quaife ATB Helical LSD differential for BMW 325i E30 is also now subject to a lifetime warranty (subject to terms and conditions).