BMW reveals secret prototypes for M6 CSL, M5 CSL, and M3 CSL with V-8

BMW has just launched an M4 CSL for the 2023 model year, the first car to wear those famous three letters since the legendary E46-generation M3 CSL built between 2002 and 2004. If you’re unfamiliar with the famous badge, CSL first featured on the 3.0 CSL race car of the 1970s and has traditionally stood for “Coupe, Sport…