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 oblige. We have developed a secondary cat bypass X-pipe to remove the restrictive factory catalytic converters and improve the sound. Up the tone without drone!

Please Note: Purchase Disclaimer - Fabspeed Motorsport does not condone the use of emission defeat devices for any vehicles used on public streets or roadways. Fabspeed Motorsport will not tamper, remove, disable, or bypass emissions equipment on a motor vehicle in accordance with 40 CFR Section 86.1854.12(a)(3), Clean Air Act 40 CFR 1068.101(b). This includes software, known as tunes, that reprogram a motor vehicles electronic control module to alter engine performance and enable the removal of filters, catalysts, and other critical emissions controls.

• Fits all BMW F80 / F82 M3 & M4 2014-2018 vehicles worldwide - including vehicles equipped with the M-Performance Exhaust - Does NOT fit F83 convertible.
  
• Simple bolt-on installation with NO Check Engine Lights - Minor cutting required for removal of OEM part on Standard M3 / M4 Model
  
• 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 Warranty

• BMW 3 Series F80 M3 Saloon (2012-2015)
  
• BMW 3 Series F80 LCI M3 Saloon (2015-2018)
• BMW 4 Series F82 M4 Coupe (2013-2017)
  
• BMW 4 Series F82 LCI M4 Coupe (2016-2020)

Does not fit the F83 M4 Convertible 

To ensure the part(s) you have ordered fits your vehicle, we run a compatibility check prior to dispatch. We can do this either using your registration number(UK) or the last 7 digits of your VIN. Simply enter your car details prior to checkout. 

Part Number

FS.BMW.F8X.SCBX (Standard M3 & M4)

FS.BMW.F8X.SCBXM (M Performance)

Manufactured by

Fabspeed