The BMW 3.0 CSL was a special variant of the BMW New Six Coupe. Introduced in 1972, the 3.0 CSL was created in order for BMW to reach homologation requirements for the European Touring Car Championship. The L in the name CSL means light, as the CSL features large weight reductions compared to its more luxurious siblings. While all CSL cars were fitted with a version of BMW's M30 inline 6 engine, displacement grew slightly over production until 1973 when displacement reached 3.2L. This engine upgrade coincided with the homologation of the aero kit for roadgoing versions. Cars fitted with this body kit are commonly referred to as 'Batmobile' cars.