majority of 2542 units were made available in two-door form (code name AK95). No catalytic converters were installed on this limited version. The steering rack, springs, shock absorbers, and brakes were similar to the normal E30 6-cylinder models (i.e. 325i) with sports suspension. The engine was mated to a Getrag 265 5-speed transmission in dog-leg configuration. Competition Audi's RS models, Mercedes-Benz's AMG models, and Lexus F models are often reviewed in direct competition to a similarly sized BMW M car, such as the Lexus IS-F vs. Audi RS4 vs. Mercedes C63 AMG vs. BMW M3. In contrast to aftermarket tuners, Alpina BMW-based cars are currently mostly built by BMW on its production lines and are more comfort-oriented. Alpina is recognized as a car manufacturer and works very closely with BMW, sometimes participating in the development of BMW models and engines. Some Alpina models are even sold in North-America by BMW and either compete with the BMW M6 Gran Coupé, in the case of the Alpina B6 Gran Coupé, or replace them, in the case of the Alpina B7 as there is no M7 variant of the 7 Series to compete with the model. BMW M also faces competition from several independent companies offering their own performance versions of BMW models; some performance packs can be retrofitted to existing cars while others are applied to new cars bought directly from BMW AG and converted prior to first registration. Such companies include Hamann Motorsport, Dinan Cars, G-Power, AC Schnitzer and Hartge. See also BMW in motorsport BMW Motorsport BMW model designations History of BMW Audi S and RS models Mercedes-AMG Alfa Romeo Quadrifoglio References External links BMW M: Home of high performance cars BMW Motorsport (competition) website BMW Automotive companies established in 1972 Official motorsports and performance division of automakers 1972 establishments in West Germany