BMW M8 (F9X)

Popular starting points are a valved exhaust for more V8 character, carbon styling such as a rear spoiler or diffuser, and paddle shifters for the cabin. Lowering springs reduce the arch gap without losing the adaptive dampers. Many owners then add an ECU tune, as the S63 makes strong gains on software alone. For track use, prioritise brake fluid and pads before adding power.

Mechanically the M8 and F90 M5 are closely related, sharing the S63 V8, eight-speed gearbox, M xDrive and brake hardware. Brake discs, pads, many engine parts and some intake components are often listed for both cars. Bodywork, exhausts and aero are specific to the M8, and some parts differ between the Convertible, Coupe and Gran Coupe. Check the fitment on each R44 listing or ask our team.

The M8 uses the same S63B44T4 engine as the F90 M5, so tuning results are similar. Established tuners typically advertise around 700 hp at the crank from software on the standard turbos with high-quality fuel, with further gains using fuel system and cooling upgrades. Figures vary with conditions and dyno type, and DMEs produced from around mid-2020 usually need a bench unlock before tuning.

Yes. Spring kits and height-adjustable springs from brands such as KW and AST are designed to work with the factory adaptive dampers, so damper modes continue to function. Check that the kit is listed for your body style, as the Convertible, Coupe and Gran Coupe have different weights and rear spring rates. A full alignment after fitting keeps tyre wear and handling balanced.

No. Cars fitted with M Carbon ceramic brakes use different discs, pads and calipers from the standard M compound system, so parts are not interchangeable without converting the whole system. Before ordering pads or discs, confirm which brakes your car has, usually visible by caliper colour or on the build sheet. Standard steel systems suit high-temperature fluid and track pads well.

In the UK, aftermarket parts do not automatically void the whole warranty, but BMW can decline claims it attributes to a modification, and engine software is detectable. Bolt-on styling and suspension parts are generally lower risk. Declare every modification to your insurer, keep original parts if the car is still under warranty, and use established brands with professional fitting for the best outcome.