Product Details:

Increase power and sound with a free-flowing x-pipe section that replaces the restrictive and redundant factory secondary catalytic converters for increased exhaust flow.                                       

This system was born through a customer's request for a more aggressive exhaust note out of his M-Performance rear muffler equipped M3, and when it comes to new development we are happy to oblidge. We have developed a secondary catbypass X-pipe to remove the restrictive factory catalytic converters and improve the sound. Up the tone without drone!



  • Fits all BMW F80 / F82 M3 & M4 vehicles (2015+) including vehicles equipped with the M-Performance Exhaust. NOTE: Does NOT fit F83 convertible.
  • Simple bolt-on installation with NO check engine lights - Minor cutting required for removal of OEM parts. 
  • Dramatic improvement in exhaust tone
  • Direct replacement for restrictive and redundant OEM secondary catalytic converters
  • Constructed in-house at Fabspeed from 14-16ga CNC mandrel-bent T304L stainless steel
  • Flanges and braces waterjet cut and CNC milled in-house by our precision machine shop
  • Simple bolt-on installation with NO check engine lights
  • All Fabspeed performance products are backed by the Fabspeed Lifetime Limited Warranty

Fabspeed - BMW M3 & M4 F80 / F82 Secondary Catbypass X-Pipe