The strongest M engine yet
The S58 has picked up where the S55 left off and gone further - a closed-deck 3.0 twin-turbo six that takes a Stage 1 map to around 600hp and Stage 2 hardware comfortably beyond, on internals that haven't needed touching. The G8x chassis takes the power just as calmly, xDrive cars especially. The aftermarket matured fast because everything learned on the F8x carried over: cooling first, then breathing, then boost.
The proven upgrade path
G8x - frequently asked
Do M2, M3 and M4 parts interchange?
Largely yes - one platform, one engine. The G87 M2's shorter body means some exhaust and aero parts are specific; xDrive vs RWD affects a handful of chassis items. Fitment notes call out every exception.
How much does a Stage 1 make on the S58?
Around 590-620hp on pump fuel depending on spec and fuel quality - with the factory engine untouched. It's the biggest single gain available on the car.
Will tuning work with the factory warranty?
A remap can affect the warranty on engine and drivetrain components, and dealers can detect flashes. We'll talk you through the real-world position - and we back our own work with a workmanship guarantee.
Do you offer ECU tuning in-house?
Yes - Stage 1-3 and custom ECU mapping are done fully in-house. We don't currently offer parts fitting, but we're happy to advise on your install.