BMW F40 M135i/F44 M235i xDrive B48 Catless Downpipe

elcome to WeldAffection, brilliantly engineered by combining the best features of our original downpipes with new, enhanced design elements. Our ultimate goal is performance—and we’re proud to introduce the BMW F40 M135i/F44 M235i xDrive B48 Catless Downpipe for your vehicle.

WeldAffection Downpipes are a direct bolt-on fit, requiring no modification. Our decatted downpipes are manufactured with OEM-style flanges and fittings, ensuring an easy, trouble-free installation.

Downpipe Features

• 100% bolt-on installation

• Constructed from grade 304 stainless steel

• Mandrel-bent piping for optimal flow

• CNC-machined 304 stainless steel flanges

• Fully TIG/argon welded

• Catless design — ideal for race use, track driving, or ECU remapping

• Significant power gains

• Inlet diameter: 90 mm

• Outlet diameter: 76 mm

• Faster turbo spool-up and improved throttle response

• Enhances exhaust tone with a deep, aggressive sound

This downpipe is engineered to deliver improved exhaust flow and long-term durability, making it the perfect performance upgrade for your BMW’s B48 engine.

Vehicle Fitment

Compatible with BMW F40 M135i/F44 M235i xDrive B48 Catless Downpipe:

BMW

• 1 Series (F40) 2019–2024

  • 128Ti (195 kW) | 11/2020–06/2024

  • M135i xDrive (225 kW) | 11/2020–06/2024

• X2 (F39) 2018–2023

  • M35i (225 kW) | 11/2020–

• 2 Series Gran Coupé (F44) 2020–

  • M235i xDrive (225 kW) | 11/2020–

MINI

• Countryman (F60) 2017–2023

  • JCW ALL4 (225 kW) | 11/2020–2023

• Clubman (F54) 2015–2024

  • JCW ALL4 (225 kW) | 11/2020–2024