It’s known as the Competition Line and represents a comprehensive aftermarket package.
Alongside this power upgrade, the tuner can also offer a new exhaust system as well as some new wheel options.
There is a new front splitter, rear wing, side skirts, a new diffuser, and an asymmetrical racing stripe.
Swiss tuner Dähler has got their hands on the mighty little BMW M and the result is rather impressive.
If you don’t fit the wheels, you have yourself quite the sleeper here and will hand out many lessons at the traffic lights to unsuspecting performance car owners.
The changes may be subtle, but they just make the looks of the Z4 pop that little bit more.
For those who plan on participating in track days can order a roll bar and racing seats, which are available at an extra cost.
The tuner says that they can also modify several other versions of the all-new X3, and not just the M40i flagship.