I have m2 downpipe/magnaflow midpipe/blitz catback. The best sounding 2-rotor I've ever heard.

However, I always have a small tick tick exhaust leak coming from the flanges at the dp/mp. I'm using a universal 3inch gasket from autozone...however it just doesn't seem to be doing the job. I never really realized the leak was coming from that location until feeling air escaping around the flanges today.

Now, my question is....

- My wideband taps into the midpipe....so if theres a minor gasket leak before the midpipe, how much is it skewing the readings. I really don't care about the leak so much right now...

 

ive heard yes and no. on a na car there are pulses high to low pressure so the lower pulse will pull some air in as some of the exhaust will slip out on the high pressure. Kan said after the turbo not so much as the turbo will smooth out the pulses a bit. idk