Even though the BMW M135i has gone out of production, being replaced by the amazing BMW M140i in the process, people are still admiring its tuning potential. The N55 units under its hood has been experimented with for quite some time now and kits for getting more oomph out of it are now available at a lot of vendors. One of them is BR-Performance that claims to offer a Stage 2 upgrade that will seriously up the figures of your engine.

In standard guise, the BMW M135i used to come with 326 HP and 450 Nm (332 lb-ft) of torque. Considering the size of the hot hatch, you can imagine it doesn’t waste any time getting off the line in a hurry. The 3-liter straight six engine under the hood can also handle those figures easily without facing reliability issues later down the road. The car in the video below, however, comes with no less than 400 HP and 540 Nm (398 lb-ft) of torque, figures good enough to make even the M3 and M4 models raise a brow.


Unfortunately, the guys from BR-Performance didn’t offer a dyno chart as well so we don’t really know the power band delivery Nevertheless, the sound this M135i makes is absolutely crazy and it’s all due to the so-called BRP Pops&Bangs package. That’s an optional feature you can get for your car that apparently turns it into a hot hatch.

The new BMW M140i comes with a better sound than its M135i predecessor due to its new B58 engine. However, this particular Bimmer is something else as you’re about to witness.