"Motorsports" is used in the title of this company. However they are a far cry from anything motorsports. A lot of snake oil products. The company focus seems to be ebay, baiting people with 928 porsches to buy junk parts that don't fit and are poorly made at best. From control arm rebuild kits, to supercharger rebuilds, all failing prematurely because they lack any knowledge or equipment to service properly. don't send a supercharger to 928motorsports to be rebuilt as they lack any real equipment to balance ore machine internal parts properly. send your kompressors and related parts to a supercharger rebuilder who ones the proper equipment to rebuild them properly and avoid the pitfalls of amateur supercharger rebuilds that typically damage the motor when they fail