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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.
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)
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.
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
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.
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
Ships within 48 hours · Estimated delivery Jun 22 - Jun 27
US$40
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