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    • Evolve Automotive E9X M3 S65 V8 Primary Cat Delete / Test Pipes dyno results, pictures, and video

      It is well known that the Primary cats are a major restriction point on the E9X M3. There are a number of solutions on the market including a full X Pipe which removes the primary cats (our one also has 200 cell secondary cats and resonators) or Primary Cat Delete/Test Pipes. X Pipes are designed to appeal to those who want a bolt on solution that can be easily reversed when required. This also gives the user the option to sell the X Pipe on should they remove it.

      Primary Cat Delete/Test Pipes are designed for those who do not want to go the full X Pipe route and are happy to modify their existing X Pipe. Our Primary Cat Delete/Test Pipes are the first in the market to use a slip on and clamp solution. This provides a solid/tight fit without the need for welding.






      Here are the dyno results from a forum members E92 M3 with stock ECU and Eisenmann Rear Exhaust:

      WHP


      BHP


      We installed a set last week on a forum members car. Here are some pictures during install.
















      Video of the car on the dyno and sound comparison before and after:


      This article was originally published in forum thread: Evolve E9X M3 Primary Cat Delete/ Test Pipes started by Imran@Evolve View original post
      Comments 4 Comments
      1. Sticky's Avatar
        Sticky -
        Minor editing done and promoted to the front page.
      1. onurleft's Avatar
        onurleft -
        So this was done with no change to the tune? How much more will it pick up tuning it if so, i'd imagine there's some left on the table..

        Does the ECU adapt to having no cats ? I know on an E46 M3 or E36 M3 if you slap on headers your going to run lean, and dangerously lean if you decide to track it like that.

        Good numbers otherwise. We are about to slap on some test pipes to my friends E90 M3 ZCP
      1. Imran@Evolve's Avatar
        Imran@Evolve -
        Click here to enlarge Originally Posted by onurleft Click here to enlarge
        So this was done with no change to the tune? How much more will it pick up tuning it if so, i'd imagine there's some left on the table..

        Does the ECU adapt to having no cats ? I know on an E46 M3 or E36 M3 if you slap on headers your going to run lean, and dangerously lean if you decide to track it like that.

        Good numbers otherwise. We are about to slap on some test pipes to my friends E90 M3 ZCP
        Yes on stock ECU map.

        Tuning would provide up to 18 WHP more.

        The ECU manages the fuelling fine on this application.
      1. JonMartin's Avatar
        JonMartin -
        I'm glad chopping the front cats was the first thing I did to my M3 back in January 09' I also remember certain folks telling me it didn't make a difference and my dyno's were a lie/fake/wrong etc. Click here to enlarge