The CTS Turbo Catless Downpipe BMW N55 (Electric Wastegate) is made to maximize exhaust flow for the highest power gains. Do not compromise performance and sound with factory parts – unleash your BMW’s potential!nnDesigned using the latest in CAD technology; this part is made to fit perfectly in place of your factory downpipe. Manufactured from T304 stainless steel, hand TIG welded and back purged to ensure years of reliable performance.nnProduct Details:nnPrecisely designed and tested on a real car in the real worldnnT304 stainless steel, TIG welded back-purged constructionnReplaces restrictive factory downpipennGreat power upgrade with uncompromising performancenIncredible sporty exhaust sound, subtle when cruisingnNo drone with factory exhaustnnTo remove the CEL that will occur, proper tuning software must be used. The use of a Bootmod3 downpipe software upgrade is strongly recommended. For OFF-ROAD use only.nnApplication guidennBMW X4 F26 M40i (2014-2018)