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Evolution Racewerks Competition Series 4" Catless Downpipes - BMW F30 F32 F33 F20 F21 F22 N55 Engine
Evolution Racewerks Competition Series 4 " Catless Downpipes - BMW F30 F32 F33 F20 F21 F22 N55 Engine

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Free Evolution Racewerks Lanyard & License Plate Frame Included!

Special Instructions: Please call to verify availability before ordering

SKU: 18-ER-CBD-F30N55

Additional O2 Sensor Bung:

EGT Bung:

Free ER T-Shirt Size:


Product Details
  • Better throttle response and faster turbo spool up times.
  • Mandrel Bent 4" piping. Smooth transition to the exhaust system.
  • 100% Stainless Steel Construction
  • 100% TIG welded for better quality welds
  • Precision CNC machined turbocharger V-Band flange.
  • Brush Finish (standard) or Full Polish Optional
  • Available with high temperature Black Ceramic Thermal Coating to reduce underhood temperatures.
  • Optional - Additional O2 sensor bung for wideband O2 sensors (comes with pre-installed plug)
  • Optional EGT sensor bung for EGT gauges (comes with pre-installed plug)
  • Compatible with the factory or aftermarket exhaust systems.
  • Track tested durability.
  • Includes all hardware for complete installation.
  • Limited Lifetime Warranty.
Restrictions in the exhaust system robs horsepower and torque especially on turbocharged cars. Thus, removing as much exhaust flow restrictions will increase horsepower and torque significantly. The catalytic converter found in the factory downpipe is a big culprit of this and is a major exhaust flow restriction. The factory catalytic converter is made up of catalyst material formed into "honeycomb" weaves. Exhaust gas must pass through these tiny "honeycomb" weaves on their way to the exhaust system thus causing a major exhaust flow restriction. It also causes turbulence after the catalytic converter which causes the exhaust flow to slow down (which increases restriction). By replacing the factory downpipe (which houses the catalytic converter) with an Evolution Racewerks Competition Series 4" Catless Downpipe, more power is unleashed! You will feel the difference instantly.

These Competition Series Catless Downpipes are constructed out of 100% 304 grade stainless steel and utilize mandrel bent piping. They are 100% TIG welded in house fabricators and built in the USA. The factory turbocharger turbine housing utilizes a V-Band flange which we have duplicated and CNC machined cut out of billet 304 stainless steel. Stainless Steel CNC machined O2 sensor and laser cut brackets are TIG welded using stainless steel rods. The O2 sensor is positioned at the factory location. Since the outlet of the turbocharger is 3.5" and the factory exhaust system is 3", the factory downpipes reduces size using short transitions from 3.5" before the catalytic convert and 3" afterwards. Due to space needed for the catalytic converter, the factory downpipes reduce in size using very short transitions. Since ER's catless downpipes delete the catalytic converter, there is more space available so ER uses very long transitions. These longer transitions allow the exhaust gas time to smoothly transition from the larger piping to the smaller. ER also utilize a larger 4" pipe right after the turbocharger so turbo backpressure is significantly reduced. This results in less exhaust turbulence and backpressure which again improves throttle response and decreases turbocharger spool times (less turbocharger lag).

Fits the following vehicles
  • 2012+ BMW F20 F21 M135i M135ix 3 & 5 Door
  • 2013+ BMW F22 M235i Coupe
  • 2012+ BMW F30 335i 335iX Sedan & xDrive
  • 2013+ BMW F32 435i 435iX Sedan & xDrive
  • 2013+ BMW F34 335i xDrive Gran Turismos

Available Options
  • Ceramic Thermal Coating
    • The purpose of ceramic coating downpipes is to keep heat from the exhaust gases inside the downpipe from radiating out. This keeps underhood temperatures lower and less heat absortion by nearby parts/surfaces. Another added benefit is that by keeping in heat (energy) in the exhaust gases inside the downpipe, exhaust flow velocities stay up, resulting in lower backpressure. The ceramic coating also adds additonal corrosion resistance. We utilize the best ceramic coating possible. Our thermal coating can resist up to 2000F of heat. It is available in black only (all the other colors cannot withstand heat that high).
  • Additional 02 Sensor Bung
    • An additional O2 sensor bung can be added so that you can easily add a wideband o2 sensor and gauges so that you can monitor air/fuel ratios. The additional O2 sensor bung will come pre-installed with a plug so that you do not need to run the o2 sensor right away.
  • Optional EGT (Exhaust gas Temperature) Senor Bung
    • An additional 1/8" NPT bung can be added so that you can easily add a EGT sensor and gauge. The optional EGT sensor bung will come pre-installed with a plug so that you do not need to run the EGT sensor right away.
Exhaust Modification WARNING!
Certain parts are intended for racing and off-road situations and not meant to be used on any public streets, road or highways. Some or all of these parts may not comply with Federal, State, Province, and/or Local laws, ordinances, and regulations. if is YOUR responsibility to ensure that any modifications or upgrades that you do to your vehicle conforms to all applicable laws and regulations for road use, especially pertaining to safety and emissions.

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