Sloan Services better known as SSI Performance, offers mechanical and repair services for German cars, with a focus on Porsches. Technicians also work on Volkswagen, Audi, BMW, and Mercedes-Benz vehicles. In addition to routine maintenance and larger repair jobs, the main focus of SSI is on performance modifications and upgrades. With three mechanics, four lifts, and a complete performance shop including a dyno, SSI can take customers' vehicles to the next level.