BMW M4 CSL Adds Power, Drops Weight, Costs a Lot

This year marks the 50th anniversary of BMW M, and to celebrate the occasion, the company is bringing back three very important letters: CSL. Originally an acronym for “coupe sport lightweight,” which later became “competition sport lightweight,” BMW’s CSL models have built on their standard variants by adding power and removing weight to increase overall performance. Making its debut Thursday, the new M4 CSL continues that tradition.

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