Wagner Tuning Catted (Sports) Downpipe Kit for BMW F2X M135i M235i F3X 335i 435i & F87 M2 (Non Comp)

By Wagner Tuning
£815.00
Available – Dispatched within 3–5 Days

The Wagner Tuning N55 Catted Downpipe Kit is a high-flow exhaust upgrade engineered specifically for early-build BMW F-Series N55 models produced up to June 2013.
Designed to replace the restrictive OEM catalytic converter, this downpipe uses a motorsport-grade sports catalyst to improve exhaust flow, reduce backpressure and enhance turbo efficiency — all while maintaining a more refined, OEM-friendly character compared to a decat.

Perfect for Stage 1 and Stage 2 tuned cars, the Wagner catted downpipe offers noticeable gains in throttle response, spool time and mid-range torque for off road track/motorsport use.

Key Features

  • High-flow sports catalyst for improved exhaust velocity

  • Reduced turbo spool time and enhanced throttle response

  • Lower backpressure allows the turbo to operate more efficiently

  • TIG-welded stainless-steel construction for durability

  • OEM mounting points retained for clean, direct-fit installation

  • Supports Stage 1 and Stage 2 tuning levels

  • More refined sound compared with a fully catless system

  • Designed for early N55 F-Series vehicles (pre-07/2013 fitment)

Compatibility

BMW F-Series N55 (Build date – up to 06/2013)

  • F20 / F21 – 1 Series

    • M135i (early N55)

  • F30 / F31 / F34 – 3 Series

    • 335i (pre-07/2013 N55)

  • F32 / F33 / F36 – 4 Series

    • Early N55 applications only (rare)

For vehicles built from July 2013 onwards, use the 07/2013+ version of this downpipe.

Ideal For

  • Stage 1 or Stage 2 tuned N55 engines

  • Drivers wanting improved turbo response without going fully catless

  • Track/motorsport off road builds requiring better exhaust flow and mid-range power

  • Cars suffering from backpressure limitations with OEM hardware

  • Owners wanting a more refined and emissions-friendlier upgrade than a decat

Why Choose the Wagner N55 Catted Downpipe (–06/2013)

The factory downpipe fitted to early F-Series N55 models restricts flow and increases turbo backpressure, hurting performance once boost levels are raised.
Wagner’s sports-catted design solves this by offering far better flow characteristics while keeping noise, emissions and overall drivability closer to OEM.

Benefits include:

  • Faster spool and sharper throttle response

  • Stronger mid-range power

  • Lower EGTs and reduced turbo strain

  • High-quality stainless construction built to last

With precise fitment and proven performance, this is the ideal upgrade for early N55 owners seeking reliable gains without the compromise of a decat.

Installing / Notes

  • Direct-fit for pre-07/2013 N55 vehicles

  • ECU tune recommended for best results and to avoid CEL warnings

  • Professional installation advised

  • Not suitable for OPF/GPF-equipped models

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