invidia exhaust with cnt rtp's

[brado]

i need to know if i have an exhaust leak. it doesnt sound like i do but if you put ur hand where the header is u can feel air but only if u give it gas. if its at idol u cant feel the air. wouldnt i be able to hear an exhaust leak? also would it possibly seal itself up with heat?

http://socialcam.com/v/lLsETdD4

the reason im wondering is because i think i tightened the the top bolt on the drivers side too much because after i tightened it the threads stripped, i cant tighten it or loosen it anymore. its not a lot of air you can feel just a little. is this something i should worry about?