Quote Originally Posted by GandalfTheIbis View Post
Are you catless? I installed hi flow cats and the milltek valvesonic at the same time and there was definitely some rasp... then a couple weeks ago my cats melted so I’m now running test pipes and added the center resonator on the same day. Valve open is very fart can like especially at lower RPM’s like 2400-3200 ish sounds awful with rasp and the valve open. Closing the valve makes it a bit better but still I hate the raspy frequency down low. Driving on the highway light acceleration in 6th or 7th from 85mph makes the worst noise. I usually downshift to 5th and hit it from there just to avoid the noise.

I have some revving, launching, and in cabin sound clips I can email you of my setup pre-gutting and resonating. Send me a message with your email address if you want those.

I don’t have anything of the current setup yet but the plan is to record similar clips.


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I'm catless now, but running the x pipe instead of the front resonator/silencer.

Strangely enough, once the car is warm/hot, the fart can noise goes away... I need to figure out what the heck is happening.

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