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Diffsonline is involved in motorsports at all levels from High Performance Drivers Events to entry level amateur racing to full professional race teams. For their products to be the best, they must test them in the most rigorous fashions. This can only be accomplished safely on a race track. Their BMW differentials are proven week after week under some of the harshest conditions cars will ever see. They participate regularly in High Speed Driving Events, as well as supply countless cars with differentials that will hold up to the high demands of the track. Diffsonline has also built some custom BMW differentials to hold up to the unique demands of the latest automotive craze... drifting. Diffsonline is involved at the professional level of racing, they supply BMW differentials for teams where the ultimate in performance and reliability is a must. Their differentials can be found under cars in most every major professional GT and Touring Car series in the US. Diffsonline is also heavily involved in supplying many top club racers around the country with trick differentials to help them stay ahead of the competition in many sanctioning bodies including BMWCCA, SCCA, and NASA.


In this category you can find performance parts from top suppliers to improve the acceleration, braking, handling, or sound of your BMW or MINI. Browse the catalog below to find high-quality aftermarket parts like short shift kits, underdrrive pulleys, clutches, brake upgrade kits, and performance exhaust kits.

Bavarian Autosport has been helping BMW and MINI enthusiasts maintain, repair, and upgrade their vehicles for more than 43 years. Every item we sell comes with a 100% satisfaction guarantee and a minimum one-year warranty, and a two-year warranty on every part with the Bavarian Autosport brand. Because we use the same manufacturers as BMW, all of our parts meet or exceed the OEM equipment. We have a full team of advisors ready to answer your questions and help you find the right part for your BMW or MINI by phone or email. We even give you free shipping on most orders over $99 and because we're located in tax-free New Hampshire, there is no added sales tax for any purchase.

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