APEX specializes in the production of light weight performance wheels for BMW models that are commonly seen at the track.  They have developed the most aggressive 1 series track wheel on the market.  They produce light weight wheels for every 3 series model from e30 to e92.  Their E30 M3 wheel is the lightest direct fitment wheel on the market, and it provides the most Big Brake clearance of any comparable wheel.  They even produce a 4 lug direct fitment version of the wheel to cover the non-m e30 owners.  Their wheel line is constantly expanding, so keep an eye out for new product developements.