This one is mostly about looks. Sure, Vorsteiner has added a little power to the BMW 1 Series M Coupe, but the GTS-V upgrade is mostly about gaining a more muscular stance on the road. Everything is based on improving aerodynamic efficiency through all-new pre-preg carbon fiber components. The upgrade also includes a new diffuser with extended aero fins and a trunk lid that adds downforce to the rear axel. [Motoring Exposure]