Case in point: Vorsteiner and its ludicrous GTRS4 wide body kit with the BMW M4. Part of the joy of the SEMA Show is that all of the best tuners in the world are competing to show off their wares ...

Can the BMW M4 CS hold its groung in a straight-line test against the Lamborghini Huracan Sterrato? Or is it the other way ...

BMW claims 503 horsepower in M4 Competition tune, but dozens of easily googled dyno charts reveal the peak power is closer to 550 hp. The torque number seems to be accurate; BMW states the engine ...

The whole ensemble of exposed carbon fiber elements is a product of Vorsteiner - yes, the same American company that makes premium wheels for exotics and performance vehicles. Unl ...