BMW probably make the finest driving cars available in the world. Okay, you have the likes of Porsche and Ferrari, but BMW cars are arguably the leaders in chassis performance in their class. To help keep your BMW performing like new you need car parts that are the same or better than the parts fitted from the factory. All the car parts available from Street & Circuit meet this requirement. Brands like Sachs are fitted by BMW at the factory. The Sachs or Bosch parts supplied by your BMW dealer are the same as the Sachs or Bosch parts sold by Street & Circuit but at a much lower price.