BMW340i440iB58Downpipewith200CellHi-FlowSportCat&HeatShield

MTC Motorsport BMW B58 Stainless Steel Downpipe With Hi-Flow 200 Cell Sports Cat and Heat ShieldThe B58 downpipe is machined from T-304 high-grade stainless steel and are tig welded in house.This downpipe comes straight from the turbo providing a sharper throttle response due to a faster spool of the turbo.It will provide noticeable power gains and a much more aggressive exhaust note which sounds amazing.It produces lower temperatures and less exhaust backpressure due to the relief of the turbocharger. The cylinder charge is increased which gives you maximum performance.Finished in brushed stainlessThese will fit the following models with B58 engine and pre OPF.BMW M140iBMW M240iBMW 340iBMW 440iBMW 540iBMW 740iWe have tested this product and found increases of around 20-25 bhp without tuning and 120bhp+ on a tuned car. Professional installation is recommended as some exhausts sit slightly different from others and can be tight.Note: we cannot guarantee that this will pass an MOT test.