First off is a power upgrade for the current (2011) 535i. The technicians over at Kelleners are able to dial output on the 3.0 liter inline 6-cylinder twin-turbo to 367 PS (270 kW) and 480 Nm (354 lb-ft) of torque - up from the series' 306 PS (225 kW) and 400 Nm.
Kelleners also provides a new quad-piped stainless-steel sport exhaust system fitted with a silencer. A suspension kit lowers the 535i by 30 mm.
A body kit is also part of the tuning package which includes a new front apron with a spoiler lip, a new front spoiler with LED daytime running lights, side skirts and an apron at the back integrated with a rear diffuser.
The whole thing rides on 19-inch or 20-inch alloy wheels.