Does anyone think that jb weld can stand up against the hot temps of the inside of a downpipe? I want to weld a little lip onto the thing , because air is leaking through their and the o2 housing. I had a dp made at a local muffler shup and i was comparing it to the stock on and i noticed there was a little lip on that one that kind of tucks into the o2. Any help would be appreciated.- Thanx