Its almost been a week since the longtubes went in and maybe Im just paranoid something went wrong or there are some weird noises im hearing. How do I tell if there is an exhaust leak? When Im at half throttle it seems to be making a hiss but it sounds like its coming from the catback (hooker) I had this hiss when I first picked up the car but then it stopped now it started again. It doesnt seem like Ive lossed any power, but its just making me paranoid. It was high 50's mid 60's then it dropped down to low 30's, so I dont know if climate would affect that. I popped the hood after I shut my car off and on the right side it makes a sound like the trickling of water. It will make a sound, the pause, make a sound, then pause. Any help would be appreciated. Thanks.