When i let off the gas i hear a hissing sound coming from the exhaust. I think it is an exhaust leak coming from the h-pipe in the middle. I have taken it apart and tried to adjust it to fit tighter and better but the problem only seemed to get louder! Has anyone else had this problem? and how do u fix it?

 

how long have you had your exhaust...if you can get it up in the air running and spray some water to see if you see bubbles...it might just be your exhaust exhaling from the pressure difference