This F82 M4 is our daily that doubles as a serious track weapon. The idea was simple: take what BMW did with the M4 GT4 race car and bring as much of it as possible to a street-legal build. No half measures—real GT4 parts where it matters, proper cooling, and chassis setup that actually works on track.
The S55 was already a solid base, so instead of chasing big power numbers we focused on making the car work as a complete package. 500hp map, GTS gearbox and diff calibration, and then everything around it to handle the power: cooling, brakes, suspension geometry, aero. Every upgrade was chosen because we needed it, not because it looked good on a spec sheet.
This build has evolved through three phases. Each one addressed what we learned from the previous track sessions. That's how you build a car properly—drive it, find the weak points, fix them, repeat.