Lets see, the cat converter is gutted and when i press on accelerator it has an exhaust leak, and yes i can hear it coming from the heat shield, and like i said if i let the exhaust build up from sitting in 1 spot for more than 2 mins, when i try to leave it sounds like no exhaust is getting through and it sounds like that right under my feet so that is the cat converter again.. lets see.. before when it didn't have a leak (wasn't as loud) it never never did this..... anything else you would like to know?