So I’ve had this on the car for 2500 miles. Because I’m lazy and didn’t want to dig up and install the latest evolver software, I didn’t even clear adaptations and just plug and played it. My car has a Stage 1 tune, so the cat efficiency monitoring 02 sensors are still reading as from the factory supposedly. No CEL. Pretty confident I’ve driven it enough to say no CEl but we’ll see.
The sound with MPE is right in line with what I think the MPE + test pipes videos sound like. Maybe it’s a little quieter in cabin and a little less raspy. I love it when I’m on it. And at light throttle on the highway it’s almost as quiet as the MPE with stock pipe was. Definitely louder and bassier at lower rpm part throttle, but no drone.
Now I am only posting this now because I was waiting to see f I could cure a problem with the Xpipe to header/cat pipe joint. You’ll see in the pics from aFe there’s a clamp on each side of the x just upstream of the resonators that is designed to squeeze the xpipe’s relieved slip fit joint with the front pipes sufficiently to seal it up. This clamp is either not sufficient to squeeze the pipe or not big enough or the pipe is too thick wall, whatever t was, it was leaking at each relief in the xPipe on both sides.
So I bought two of these from summit and installed them without removing the pipe. Same concept but designed to sealnup a slip fit joint. Similar to the clamps sold with a lot of the test pipe kits. And now the leak is gone. So aFe if you’re listening, please take a look at your clamp setup.
