BMW created a secret 2018 M2 CSL prototype

BMW recently revealed previously secret M5 CSL, M6 CSL, and V-8-powered M3 CSL prototypes, but the automaker had one more surprise in store. Feast your eyes on the 2018 BMW M2 CSL prototype that never made it to production. Sporting a carbon-fiber fixed rear wing and a roll cage, the M2 CSL prototype looks a bit like the M2 CS BMW unveiled in…