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

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

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