With our F90 M5 hitting 209mph at VMAX in 1.1miles and having developed the Stage 2+ tune over the last year we knew we were right at the limit of the stock engine, and to go any further we would need to build the engine.
This is where our friends in the US RK Autowerks come in, having been building the S63 engine in the F10/F90 M5 for a few years, and then taking the car even further with uprated turbos we knew they were the choice to take us to the next level and see just how far we can push the F90 M5.
Now you all know what our ethos is - A car has to be good to drive and reliable - So this is what we hope to achieve, by curing the weak points in the S63 engine, we can safely put much larger GTX 3076R based hybrid turbos on and crank the boost up.
Enjoy the time-lapse of the engine build!