Most owners begin with reliability and supporting parts before adding power: a pinned crank hub, aluminium charge pipes and a good set of brake pads. After that, an intake, exhaust and a tune are the usual next steps. Because the M2 Competition shares the S55 with the M3 and M4, parts support is extensive, but always confirm each part is listed for the M2 Competition rather than only the M3 or M4.

The S55 crank hub is a press-fit design rather than keyed, so under high torque it can slip and alter cam timing, which can cause serious engine damage. Failures are rare on standard cars but the risk is widely considered to rise with tuning and aggressive launches. A pinned crank hub is therefore a common preventative upgrade before or alongside a remap, and it should be fitted by an experienced technician.

The factory S55 charge pipes are plastic and can crack or split when boost is raised, causing a sudden loss of power and fault codes. Aluminium replacements hold their shape under pressure, give more consistent boost delivery and often include bungs for methanol or water injection. Note that S55 charge pipes for the M2 Competition, M3 and M4 do not fit the earlier N55 M2.

Yes, in practice. The S55 uses two downpipes, and fitting aftermarket sports-cat downpipes changes exhaust flow and sensor readings, so the engine should be recalibrated to run correctly and avoid fault codes. They are usually fitted as part of a stage 2 package. In the UK the car must still pass its MOT emissions test, so choose quality catalysed parts and discuss your plans with your tuner.

The M2 CS, built from 2020 in a limited run, uses the same S55 engine tuned to 450 PS, along with adaptive M suspension as standard, a carbon bonnet, roof and aero, and optional carbon ceramic brakes. Many parts are shared with the M2 Competition, but body panels, brakes and suspension can differ, so check the fitment on each product or save your exact car in My Garage.

Yes. Most M2 Competition cars have passive dampers, so coilovers and lowering springs fit without any electronic damping to retain or code out. The M2 CS has adaptive dampers as standard, so it needs adaptive-compatible coilovers or a cancellation solution. For regular track use, height and damping-adjustable coilovers with uprated bushes give the best control, followed by a full alignment.