Photo Gallery: BMW CarBahn M4 by Dinan
So what exactly is CarBahn, and why does it matter in the context of a 735-horsepower BMW M4 Competition? CarBahn is Steve Dinan’s latest venture after selling his previous company, and its mission is refreshingly specific. Instead of chasing internet-breaking lap times or headline numbers, the focus is on balance, function, and refinement. This particular CarBahn BMW M4 happens to...