I was out driving last night after installing my new exhaust and on the way home I notice a squeal, as if there was a pebble stuck in my calipers... the sound is noticible when I'm coasting at around 30-40 MPH, but when I roll to a stop it goes away.

another thing I hear is that the ticking sound from the fuel injectors seem to be more amplified. I was wondering if I have an exhaust leak? Anyhow I used some gasket maker in addition to reusing the oem gaskets and I also tightened everything properly