BMW G Series B58

Welcome to WeldAffection, brilliantly designed taking the best assets of our original downpipes and adding some new design features we have achieved the ultimate goal, performance.
WeldAffection Downpipes are a direct fit with no modification required, our decatted downpipes are fitted with OEM flanges and fittings to allow an easy trouble free installation.We are proud to introduce our WeldAffection race & high flow catted downpipe for your B58 M240i, 340i, 440i, 540i, 740i & xDrive variants. These downpipes are THE best bang for the buck mod available for your B58 and they’re available in both race & high flow configurations.

WeldAffection B58 Stainless Steel Downpipe are made from:
Hand crafted, tig welded 4.5″ 304 grade stainless steel.
Available with a 200 cell high flow cat.
highest quality 2.0mm wall 304L stainless steel
Inlet diameter: 114mm
Outlet diameter: 90mm
Fits RHD and LHD models with no modification necessary.
Smooth radius bends to decrease turbulence and increase flow.
Fits the stock catback as well as all aftermarket catbacks.
Gains from 25-30hp with tune.

This item fits the following BMWs:

G Series 140i 240i 340i 540i 640i and 740i including xDrive.