Scorpion Exhausts De-cat downpipe - M135i 2013 - 2015

High-flow catless turbo pipe for BMW F20 F21 M135i 2013 to 2015

Unlock your N55’s potential with this UK-built Scorpion race downpipe. Designed for sharper throttle response, faster turbo spool and a harder-hitting soundtrack, this catless front pipe is a proven performance upgrade for track and dyno use. If you want a louder, freer-breathing M135i with stronger mid-range pull and a more aggressive tone, this is the hardware to start with.

Key highlights

• Fitment: BMW M135i F20 F21 2013 to 2015 N55
• Mates to the factory cat-back or Scorpion cat-back systems
• Pipe size: 76 mm 3 inch for improved flow and reduced back pressure
• Hand built in the UK for superb build quality and durability
• Ideal foundation for Stage 2 tuning, ECU calibration and track-day setups

Why enthusiasts choose this upgrade

This catless turbo outlet transforms drivability with quicker boost response and a deeper, motorsport-inspired exhaust note. It complements remaps, larger intercoolers and intake mods, helping the N55 breathe more efficiently. We have fitted these on customer cars and the feedback is consistently positive about the sharper response and enhanced sound.

Built for performance

Scorpion’s UK craftsmanship delivers precise fit and robust construction that stands up to hard road and circuit use. The large 76 mm tubing minimises restriction, helping your turbo work more efficiently while maintaining a clean, professional fit under the car.

Compatibility

Direct-fit front section for the BMW M135i F20 F21 with the N55 engine, model years 2013 to 2015. Compatible with the original rear system as well as Scorpion cat-back options.

Perfect for tuning

Pair this race downpipe with an ECU tune for maximum gains. Popular search terms include catless downpipe, decat pipe, turbo downpipe upgrade, front pipe, race pipe, M135i F20 performance exhaust, N55 tuning parts, Stage 2 hardware and BMW hatchback exhaust modifications.

Fitting service

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

Important information

This decat component is intended for off-road and motorsport use only. Use on public roads may not comply with emissions regulations.