We are proud to introduce our Yahua race & high flow catted downpipe for your B58 M140i, 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.

Back pressure is significantly reduced by eliminating the restrictive catalytic converter in the factory downpipe with our race or high flow 200 cell race cat which results in faster spool, an increase in power & a more aggressive exhaust note. Our downpipe features a full 4.5?? stainless steel design as well as a CNC 304 grade stainless steel flange that offers a smooth transition from the turbo to the mid pipes. All Yahua downpipes are hand crafted from SS304 grade stainless steel and include a lifetime warranty as well as our ?¡ãNo Hassle?¡À satisfaction guarantee (includes fitment).

Please note that the warranty on the catted downpipe is limited to one year.

Yahua 4.5?? F20/F30/F31/F32/F33/F34/F36/G30/G11/G12 B58 Stainless Steel Downpipe

• Made from hand crafted, tig welded 4.5?? 304 grade stainless steel.
• Available with a 200 cell high flow cat (1 year warranty).
• 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.
• Yahua Lifetime Warranty for race versions, 1 year warranty for high flow catted versions.