Description
Enhance performance, throttle response, and turbo efficiency with the Evolution Racewerks Sports Series 4" High Flow Metallic Catted Downpipe for BMW N55 turbocharged engines. Engineered for maximum exhaust flow, reduced turbo lag, and improved durability, this downpipe is manufactured in-house in the USA using premium 304 stainless steel and 100% TIG-welded construction.
The factory downpipe’s 400-cell ceramic catalytic converter creates major exhaust restriction, turbulence, and heat retention. This upgraded downpipe replaces it with a higher-flow 200-cell metallic catalyst, allowing exhaust gases to move freely with less backpressure. The result is faster turbo spool, improved throttle response, and increased horsepower and torque across the RPM range.
Designed with a full 4" mandrel-bent inlet and long smooth transitions, the downpipe reduces turbulence while maintaining compatibility with both OEM and aftermarket exhaust systems. Precision CNC-machined V-band flanges, laser-cut brackets, and factory-positioned O2 bungs ensure a perfect, trouble-free fit.
Optional upgrades include ceramic thermal coating, additional O2 sensor bung, or EGT bung to support wideband tuning and temperature monitoring. Built for durability and tested on track, this downpipe delivers reliable performance gains while keeping engine bay temperatures lower.
Fitment
Compatible with the following N55 six-cylinder BMW models:
• 2012–2015 BMW 335i (F30 chassis)
• 2013–2015 BMW 435i (F32 / F33 chassis)
• 2012–2015 BMW M135i (F20 / F21 chassis)
• 2012–2015 BMW M235i (F22 / F23 chassis)
• 2017 BMW M2 (F87 chassis)
Key Features
• Made in the USA
• High-flow 200-cell metallic catalytic converter
• Higher horsepower and torque curves
• Faster turbo spool and better throttle response
• 4" mandrel-bent piping with smooth transitions
• 100% 304 stainless steel construction
• 100% TIG-welded for maximum durability
• CNC-machined turbocharger V-band flange
• Brush finish standard; optional polished finish available
• Optional high-temperature black thermal coating
• Optional additional O2 sensor bung (with plug pre-installed)
• Optional EGT sensor bung (with plug pre-installed)
• Compatible with factory and aftermarket exhaust systems
• Includes all installation hardware
• Track-tested for performance and reliability
• Limited Lifetime Warranty
Note: Intended for off-road competition use only. Not legal for use on pollution-controlled vehicles on public roads and not available for sale in California.
