There's also a set of three-piece 19-inch black alloy wheels from Klassen Leichtmetallrader that are wrapped in beefy Toyo Proxes T1R tires sized 225/35-19 on the front axle and 255/30-19 on the rear.
Thanks to the H&R sport springs, the modded 135i now sits closer to the road by 1.8 inches at the front and 1.2 inches at the back.
The only upgrades for the interior concern 3D Design's aluminum pedal set and floor mats.
As for the performance mods, up until now, among other upgrades, WheelSTO says it has installed a Bastuck 2x85mm exhaust system, Bastuck y-pipe, and Riss Racing downpipe along with a charge pipe and blow off valve kit for the 3.0-liter straight-six's turbos while the ECU has been reprogrammed by L.E.T. Motorsports.