Bent Pipes Cuasing Major Decel Popping?

As some of you may know, some time ago I took my bike in to get serviced at the local shop because I felt the idle was inconsistent and it popped far to much for my liking (it was doing this even before I laid it down). Two months and $700 later still no fix.

There were a lot of different theories tossed around but ultimately they said the decel popping and inconsistent sounding idle were due to bent pipes. Now before I go and drop several hundred on a replacement set of Vance and Hines Bigshots I wanted to get the Cafe's suggestions on what could be causing my issues. The only thing Ive done since I bought the bike (used) is to remove the PAIR valve, which helped bring the bike back to where it was before the dealer got a hold of it (it was unbearable driving it home).

As ever Im looking forward to your help and getting my bike where it needs to be atriot: