A set of Bilstein coilovers and brakes from a Porsche complement the engine swap. Exterior mods mimic E46 M3 features, with flared arches, vents, and a carbon fiber diffuser.

The rear diffuser will set you back $1,495, and you will have to pay another $2,395 for the trunk lid with its integrated ducktail spoiler. Finally, the center console will set you back $995.

The E46 M3 project began with the exterior. Borrowing inspiration from the European M3 CSL, the front bumper, rear diffuser and trunk came from Vorsteiner, and all were made from carbon.

With an extra 17hp, plus a carbon fibre roof, front spoiler and rear diffuser, the CSL went from 0-62mph in a claimed 4.5 seconds compared to the standard M3 Coupe's 5.1 seconds - although many ...