BMW’s revolution and rebranding through racing started on March 25, 1973. At the Monza 4 hours race in the European Touring Car Championship, the “CSL” legend was born. Massive box flares, huge BBS magnesium race wheels and deep front spoilers adorned the delicate E9 coupe now, and the iconic German Racing White with blue and red stripes following the lines of the hood and sides of the car. And with drivers like Hans-Joachim Stuck, Chris Amon, and Dieter Quester BMW Motorsport would go on to win many races and establish the brand that would later launch the infamous “Batmobile” CSL, the 2002 Turbo, and of course the M brand. Prior to 1973, the top flight races were run by BMW through their partners Alpina and Schnitzer, and indeed the BMW Motorsport entrants at Monza failed to finish, with Niki Lauda at the hands of an Alpina E9. A few races later, the rear wing was introduced by BMW Motorsport, and in the hands of Dieter Quester the first BMW Motorsport win was recognized at the 24 Hours of Spa on July 22, 1973.
The 3.0 and later 3.5 CSLs would continue to race and win for a few years, establishing the brand as a serious contender to the established Porsche in the sporting market. Because of this, there were not only many in-period conversions to CSL race cars, but many replicas built since. This appears to be one of the latter – originally, a 2800CS which has been converted to look like the Group 2 racers with a period motor:
