Description Videos Reviews The Revolution MINI Works Shorty Street Header is the highest flowing header on the market. This header is the best matched to a car with a big valve head that is trying to make the most horsepower that it can. Each tube is at equal length for maximum flow and is 304 Stainless steel that is fully TIG welded. It has the largest tubes possible to match the large ports of high flow heads. The RMW header really comes alive around 3500 in the rpm range, and pulls strong to red line. Gains range from 8-11 HP depending on modifications done to your vehicle. Now comes with a better cat. See the video below. Note: Any header is going to make your car twice a loud as it is right now. Be aware. Also it's going to be a tighter fit due to the large size; but no modifications need to be done to the car other than maybe bending a heat shield or two to clear the tubes better. Comes with new gaskets. It comes with the best GESI high flow cat on the market (49 states/canada legal). Some older designs from time to time will get a SES light because of the cat code (P0420) depending on the tune and mods to the car. BUT they have updated to a new cat that is 49 states/Canada legal and is going to improve any chance of getting a SES light again. Also all cars will lose some low end torque due to the larger tubes and free flowing nature of a header. Note: Special order. May have 1-2 week lead time to get. Please plan ahead. This product is NOT CARB Approved. Vibrant Performance - Maximum Horse Power with GESi High Output OBD2 Catalytic Converters Vibrant Performance is proud to introduce the best catalytic c... 2 Reviews 5 RMW Shorty Street Header Posted by Dave Roycraft on 6th May 2019 Perfect fit. Noise level was acceptable. Feel power difference at 4,000 rpm and beyond. Get O2 sensor code at track only. clears itself on the drive home. Very pleased. DT Edit: if it is brand new you should not be getting any O2 Codes, and with the new Cat they used we have not seen any fail in the last few years. Give us a call and we can help! 5 RMW Shorty Street Header Posted by Dave Roycraft on 3rd May 2019 Perfect fit. No codes after install. Feel power after 4000 rpm. Did not make much louder, but already had a Borla street kit installed.