This upgrade package for the BMW M4 CSL will give it a new top speed of *205mph*

The BMW M4 CSL is a fairly potent car as is, what with its 542bhp twin-turbo inline-six and super aggressive exterior design. But what if you wanted to turn the needle up even further with a visit to G-Power? Well, it’ll offer you this conversion in return: dubbed the ‘G4M Limited Ducktail’.

G-Power starts by cranking the twin-turbo inline six’s output up to 730bhp, thanks to various fettlings with the mechanicals. And since it’s likely to be closely related to the non-ducktail G4M already available on its site, it wouldn’t be unreasonable to think the 627lb ft of torque and 205mph top speed have also been carried across. That’s more than a Maserati MC20, by the way.

Project Duck will also be limited to just 1,000 units (er, because that’s how many M4 CSLs were made) with key styling takeaways including that new wing, extra vents along the Venturi bonnet and a more imposing set of bumpers and skirts.

It actually looks… alright in all black, since the gaping mouth is veiled up a bit. But that mouth will be fairly crucial for cooling the twin-turbo inline-six. It’s also something you’ll want to do if you’re going to use this car as intended on a racetrack.

No word on pricing just yet, but with the original limited edition car setting back buyers at least £128,000, owning a G4M probably won’t be cheap.