Evolution Racewerks Performance Downpipe - F22 228i, F30 320i/328i, F32 428i

Downpipe with sport cat gains torque, horsepower, and increased throttle response with cleaner emissions than cat-delete

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$894.99 – $994.99

  • Power and torque gains
  • Better reliability and power output
  • More sound volume
  • Better throttle response and faster turbo spool
  • Cleaner emissions than cat-delete
  • Limited lifetime warranty

The Evolution Racewerks performance downpipe and sport catalytic converter for F22 228i, F30 320i/328i, F32 428i replaces the stock restrictive ceramic catalytic converter with a higher-flow metallic version. The ER N20 catted downpipe is Made in the USA from 304 grade stainless steel and mandrel-bent piping. It is a direct fit replacement for the stock downpipe, even re-using the original V-Band flange connection and including a flexible pipe section. Brackets and O2 sensor bungs are also stainless and TIG welded. The O2 bung is in the factory location (an additional O2 bung can be added, please inquire). Piping diameters and shapes have been carefully engineered to minimize turbulence and backpressure.

The factory catalytic converter is very restrictive which robs a lot of horsepower and torque but works great for cleaning the exhaust gases. However, the ceramic catalytic material is very dense and expands when it gets hot, further restricting flow. The ceramic has also been known to break down and cause a total blockage of the exhaust. This metallic cat is half the density for more flow - 200 cells per square inch instead of 400. With improved flow the turbo can spin more freely with less strain. This not only makes more power and torque but helps the turbo last longer. Even with fewer cells the sport cat still does a good job of scrubbing the exhaust and will not leave you with toxic black smoke from the tailpipe. These improvements complement the power and torque gains, making this an upgrade with many upsides and very few downsides.

This downpipe is used with the factory gaskets and hardware. Any 228i/328i/428i exhaust after the downpipe will be compatible.

Three coating finishes: mirror polished, brushed silver, or black thermal ceramic. Black ceramic helps to lower underhood temps and minimize heat soak. By containing heat inside the downpipe, exhaust velocity stays higher, improving turbo spool and throttle response.

Notice of Fault Codes/Check Engine Light. Using any non-factory emissions component may result in a check engine light and fault codes. Although we have heard of cases where no check engine light appeared, these sport cats are not designed to meet any emissions testing and regulations. Race software that is specific to your mods is strongly advised to better adapt your car to a racing environment, keep the fault codes from appearing, optimize power gains, and improve general drivability. Our Epic Motorsports Race software is strongly encouraged to meet all of your tuning goals.

Notice of Emissions Non-Compliance. Removing, disabling, or altering emissions equipment on a pollution-controlled road vehicle is illegal. Installing devices or software that trick, disable, or modify emissions controls and monitors on a pollution-controlled road vehicle is also illegal. This product is sold only for racing, competition, track, hobby, or other off-road use. It's use is prohibited in any motor vehicle that is subject to emissions inspection or control. Legal only for racing vehicles that may never be used, or registered or licensed for use, upon a public highway. Some suppliers will not ship to certain states, requiring extra delivery time. We will advise you of any delays.

BMW Fitments:

2 Series
F22 / F23 (14-16) > 228i
F22 / F23 (14-16) > 228i xDrive
3 Series
F30 / F31 / F34 (12-18) > 320i
F30 / F31 / F34 (12-18) > 320i xDrive
F30 / F31 / F34 (12-16) > 328i
F30 / F31 / F34 (12-16) > 328i xDrive
4 Series
F32 / F33 / F36 (14-16) > 428i
F32 / F33 / F36 (14-16) > 428i xDrive
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