The Wagner Tuning N55 Catless Downpipe Kit is a high-flow, motorsport-focused exhaust upgrade designed for early-build BMW F-Series N55 models produced up to June 2013.
By removing the factory catalytic converter, this downpipe eliminates one of the largest restrictions in the N55 exhaust system — maximising exhaust flow, improving turbo spool and unlocking stronger mid-range performance.

This is the ideal downpipe for drivers running Stage 2 tunes, hybrid turbos or track-focused setups where maximum performance and response are the priority.

Key Features

• Fully catless design for maximum exhaust velocity

• Significantly reduced turbo spool time

• Lower backpressure for improved mid-range torque

• TIG-welded stainless-steel construction for long-term durability

• OEM mounting points for direct bolt-on installation

• Supports high-output Stage 2 and hybrid turbo builds

• Aggressive exhaust tone with increased turbo sound

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

Compatibility

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

• F20 / F21 – 1 Series

  • M135i (early production, N55)

• F30 / F31 / F34 – 3 Series

  • 335i (pre-07/2013 N55)

• F32 / F33 / F36 – 4 Series

  • Early N55 fitment only (rare)

This version fits vehicles with the early downpipe configuration.
Use the 07/2013+ version for LCI or later N55 models.

Ideal For

• Stage 2 and hybrid-turbo N55 builds

• Track-day or off-road performance applications

• Drivers wanting the fastest turbo response and highest flow

• Cars suffering from backpressure with the OEM catalytic converter

• Vehicles paired with uprated intercoolers, charge pipes and intakes

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

The early N55 catalytic converter is highly restrictive under increased boost, limiting both turbo efficiency and top-end power.
Wagner’s catless design removes this bottleneck completely, providing:

• Much quicker turbo spool

• Stronger mid-range torque

• Sharper throttle response

• Lower EGTs for improved engine safety at high load

Built with TIG-welded stainless steel and engineered for OE-level fitment, the Wagner catless downpipe is a proven upgrade for early N55 owners chasing maximum performance.

Installing / Notes

• For off-road / track use only

• ECU tuning required to prevent CEL warnings and optimise performance

• Professional installation strongly recommended

• Not suitable for OPF/GPF-equipped models