Gumotorsport Catless Downpipe for B58 M240i 340i 440i 540i 740i including xDrive 2016 +

Part #: GMS-B58-CL-HS-001

Gumotorsport presents the catless B58 Downpipe for 2016 + M240i ,  340i 440i 540i 740i & xDrive variants. 

Highlights: 

- 304 grade stainless steel

- CNC flanges 

- Catless design , High Flow Downpipe 

- Heatshield welded on , keep engine transmission temps low 

- 4" high flow design ( Hand welded )

Back pressure is significantly reduced by eliminating the restrictive catalytic converter in the factory downpipe 

• Fits RHD and LHD models with no modification necessary.
• Fits the stock catback as well as all aftermarket catbacks.
  
• Gains from 20-30hp with tune.