I'm not sure if you can hear it in this video; I can't with my sub overpowering it.
It happens at about 40mph and when the boost gauge is around zero. The car runs great but it still in learning mode since the battery'* been disconnected for the past few days.



I can't tell yet if its coming from the front or the rear but to me it sounds like an exhaust leak but I'm no expert.

i think i hear what ur talkin about. maybe from less back pressure?

what exhaust setup do you have?

Ported exhaust mainfolds going into factory 2.5" exhaust with what looks to be a Dynomax dual outlet muffler. Not sure on the cat at all.

Found it.

My gas mileage had dropped again so I ordered a new O2 sensor. I was able to unscrew the old one with one hand and no tools.
I'll blame Bill