Re: the Stillen exhaust fitment...
Really, as many problems as I had, I think Stillen is right that this is a matter of just knowing how to do the install perfect, rather than a true parts/fitment defect. I think they're just overestimating how easily everyone else in the world will figure out how to make it work.
As others have noted, this is not a question of simple up/down adjustment of the main length of the exhaust. If you just push the whole thing up or down, you'll either hit the crossmember below, or hit the rear suspension stuff above in the rear. The trick is to adjust the angle of the exhaust. You want to raise the front a little while keeping the back down. The slipjoints in the rear help with this, so be sure you've got those loose, maybe bang on them a bit with a hammer as you're adjusting to make sure they slip into place (while also jacking up the exhaust from the little crossbar on the front Y-pipe section). I'm pretty sure it can be done, maybe it's just a little too tricky for most of us. I ended up having my guy heat the pipe just forward of the big center gasket and put a little kink there, but it was probably possible to get it to fit without doing that.
As for the slip-joints: they're there for fitment issues, to get the lengths right, which in turn gets the angle right. Once you get everything fitting perfectly though, I would weld them if I were you. That's what I did anyways.
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