from 3k down to 2k you hear the same noise i have on my f.i test pipes/Ark exhaust, its also not under any load so it will be less of a issue here!

also nice to see some local Pa members here

I have a g37s and running Stillen Gen 3 + Ark + Art pipes. and its raspy/hiss. Don't know if its a leak or...?? I'm wondering what some of ya'll did with your install to get rid of rasp. I used the stock exhaust flange gasket with black rtv to where it meets the exhaust manifold. I'm thinking of putting rtv on the flat surfaces on both ends of the pipes..would that help? ADVICE!!!??