this all started last saturday, i rolled a zo6 on the way home. got to a red light and noticed truck wasn't runnig quite right. pulled over and noticed i seemed to have developed a loud exhaust leak and thought maybe the (OBX clamps) had come loose and i would tighten once i got home. well i went to pull off and under any load the truck pops and backfires like hell. i drove it to randys and let him look at it, it was on my way home. he says that clamp had come loose and it sounded like i blew out drivers side exhaust manifold gasket. also saw that i sucked the rubber pcv valve grommet into the plenum. checked #1 and #8 plugs. plugs looked good and put a piece of high heat tape over opening for grommet. drove it home and stayed out of boost whole way and barley gave it gas. got home and checked plugs. #6 was ate up pretty good and #7 was a little messed up. replaced and re gapped at .25 and checked the rest and they were all good. cranked it and still raising all kinds of hell under load, popping and just not running right. changed drivers side manifold gasket(s) and checked all exhaust couplings for leaks and found on pass side (HI FLO) cat, the top stud by the 02 sensor, the nut had come off and had a fairly large opening from doing so. found a nut to tighten everything back up and in process, stripped nut or stud,not sure which (called it a night after that) but it closed it up almost all the way and no air seems to be coming out. but its still popping and raising hell under load and just doesn't idle smooth in gear like normal and still has loud "exhaust leak" sound. not a tick, more of a big ass leak sound. but i don't know where or what it is, I'm stumped. while in park truck sounds fine fine other than noise, only under load does it do all the popping. is it possible that one of the coils has gone bad?? would that have been evident when i pulled plugs?? I'm off call tonight so I'm going to mess with it more tomorrow and i don't want to keep bugging randy as he's helper me A LOT as it is and don't want to be "that guy" that only calls when he needs something. just wondering if anyone had ideas or suggestions. ill get a video up tomorrow too. thanks.