Full bolt-on BorgWarner EFR turbo kit for B58 Gen 1 and B58 TU 6-port engines - no fabrication, no guesswork. Fits M140i, M240i, 340i, 440i, X3 M40i and other F/G-chassis B58 cars listed in the source.
Twin-scroll cast manifold with 40% larger runners and external wastegate port
Included: stainless oil feed/return lines, Aeroquip coolant kit, silicone couplers, Smart Seal clamps, engraved heat shield, VPE V-band, gaskets and full hardware
Choose EFR 8374 (up to 650 whp), 8474 or 9174 (up to 750 whp), or 9280 (up to 1000 whp)
Requires custom tuning - compatible with MHD and BM3
Not a plug-and-play swap. Not an OEM replacement. A proper fast-road or track-day upgrade - built for power, response and repeatable reliability.
