rattling in exhaust

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    Need Help With My O/r X Pipe!!

    Hello! New here and need some help. I have 2012 5.0 and just installed UPR o/r x pipe. Having roush ab's on I wanted it louder with is why I went catless. After the tough install, (due to unbolting in a very awkward area using jackstands) it sounded great and I really loved the sound. But after...