2009 BMW 335i

This 335i is a full-on N54 conversion built for big power and reliability. The core is a Doc Race top-mount single turbo kit matched with VRSF chargepipes and a 3.5” catback, while upgraded fuel pumps, a methanol direct-port kit and a 3.5-bar TMAP let it safely feed boost. Strong internals—Manley H-beams, ARP studs and rebuilt bearings—pair with Vargas spline-lock crank solutions to handle the abuse. Cooling and driveline work (CSF radiator, LSD conversion, Vibrant resonator, Dynamic+ coilovers and Apex wheels) round it out. It’s a serious, balanced N54 built to be fast and dependable.