Yeah I'm on a mostly straight-through exhaust (FI Long Tubes and FI's Catback), and with most of the rear interior stripped out as well. At idle / low-RPM, I can always hear a sound somewhere behind me that sounds sort of like an air leak. Like a tire sitting in the back of the car with a hole in it, or a compressed air hose with a leak, etc. It's normal and nothing's leaking
