- as much as 16whp/24wft-lbs gain, depending on tuning
- torque peak at lower RPM
- save weight
- better throttle response and faster turbo spool
- lifetime warranty
The Evolution Racewerks cat-less racing downpipe for 2012+ F22 228i, F30 320i/328i, and F32 428i N20 eliminates the stock catalytic converter for unimpeded flow. The ER N20 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, a track/racing car no longer needs the catalytic converter so removing it makes sense. By deleting the cat the turbo can spin more freely and with less strain. This not only makes more power and torque but helps the turbo last longer. Removing the cat also saves weight and eliminates the possibility of the catalytic honeycomb material breaking down and causing a total blockage.
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.
Race software from Epic Motorsports is strongly recommended with this cat-less downpipe. Our race software has been adapted from our own F30 328i racing program and the result of years of racing the N20. Additional power and torque gains are realized with our software over only using the downpipe. The Epic N20 race software will also eliminate fault codes and check engine lights that come from using this downpipe with stock software (helping to pass post-race tech inspection).Application Note:
for N20 engine only, not for N26 SULEV engine. Check the emissions sticker on the underside of your hood for ULEV (N20) or SULEV (N26) engine spec.Notice of Fault Codes/Check Engine Light
- Using any Racing downpipe could result in a check engine light and fault codes, even with sport cats. Although we have heard of cases where no check engine light appeared, these Racing downpipes are not designed to meet 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.
This product is intended only for racing vehicles that may never be used, or registered or licensed for use, upon a public highway. 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. It is not legal for installation or use on any pollution controlled motor vehicle in any state, province, or jurisdiction governed by, or which has adopted, CARB or EPA regulations. BimmerWorld may confirm a customer's racing license, entry, track participation, and we may ask for photos or proof of a permanent race car build. We reserve the right to cancel part(s) that are not for legitimate racing or track purposes. Some suppliers have shipping exceptions to certain states or territories, 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 xDrive3 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 xDrive4 Series
F32 / F33 / F36 (14-16) > 428i
F32 / F33 / F36 (14-16) > 428i xDrive