Power's portfolio and boasts no fewer than 700 horses. But how much does this upgrade cost? Keep reading to find out ...

As well as losing weight wherever possible the CSL has bespoke springs and electronically adjustable dampers, rides 8mm lower and rose joints replace much of the rubber in the rear axle.

On a number of parameters, too. Which is something of a relief, because the M4 CSL has a lot to live up to. The Competition, Sport, Lightweight lineage makes sporadic, infrequent appearances ...