BMW F-Series N55 EWG (Electronic Wastegate) 4" Catless Downpipe / Decat Turbo Pipe - M135i M235i 335i 435i M2 (F20 F21 F22 F30 F31 F32 F33 F87) Straight Pipe Race DP 100mm High-Flow Upgrade

High-flow catless turbo downpipe for F-series 35i models

Unlock serious performance with this large 4 inch bore straight-through turbo down pipe for the later electronic wastegate 3.0 petrol six-cylinder. Designed for maximum exhaust gas flow, it reduces back pressure, helps the turbocharger spool sooner and delivers a stronger, more responsive feel across the rev range with a deeper, sportier exhaust note.

• Massive 4 inch diameter for freer flowing gases and reduced restriction
• Crisper throttle response and faster boost build
• Ideal foundation for remapped cars and supporting hardware upgrades
• Direct performance upgrade over the restrictive factory catalyst section

Vehicle compatibility

Suits later 3.0 petrol models with the electronic wastegate set-up, 2013 onwards:

• 1 Series M135i - F20 F21
• 2 Series M235i - F22
• 3 Series 335i - F30 F31
• 4 Series 435i - F32 F33
• M2 with the 3.0 single turbo - F87

Note: for electronic wastegate engines only - not suitable for earlier vacuum wastegate versions.

Why choose this upgrade

We have installed and run this catless downpipe on customer cars and our own builds, and feedback has been consistently excellent. The freer flowing design lets the turbo breathe, enhances mid-range punch and adds the motorsport tone enthusiasts want. It is a proven, high-impact upgrade for anyone chasing a sharper, more engaging drive.

Popular search terms

If you are searching for a catless downpipe M135i, M235i decat pipe, 335i down pipe upgrade, 435i turbo downpipe, M2 N55 catless pipe, F20 F21 F22 F30 F31 F32 F33 F87 downpipe, 4 inch downpipe, 100mm down pipe, electronic wastegate downpipe, straight pipe downpipe or race down pipe, this is the solution enthusiasts choose.

Fitting service

Professional installation available at MJ Modifications in Warwickshire. For a fitting quote, email info@mjmodifications.co.uk.

Usage notes

• Intended for track or off-road use where emissions regulations permit.
• Many owners pair this with software calibration.