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spaces) won't work
For additional support on the racetrack
and remapping the ECU is mandatory when it is fitted
Choose between your stock map or upgraded Evolve map at your convenience
Evolve Catless Turbo Downpipes - BMW 1 Series 135i | 1M | 3 Series 335i N54 E64 spaces) won't workNOT ROAD LEGAL Evolve 3" catless turbo downpipes for the N54 1M 135i 335i in T301 Stainless steel. By eliminating the restrictive catalytic converters in the factory downpipes, back pressure is reduced significantly which results in faster spool, an increase in power & a more aggressive exhaust note. Features T301 Stainless Steel 3" Downpipe design with 2. 5" flange Gaskets and new bolts provided Fits both RHD and LHD Adds approx 10 BHP & 10 lb. ft