[spool twice]

^^^definitely would have room with a different muffler/back-box or a full back-box delete for sure.

Another thing I was thinking is to somehow cross the two pipes were the OE resonator/H-pipe sits by deleting it, taking two 3" pipes and turn them more into an oval shape and criss-crossing the pipes, so not actually merging them, just having them swap banks. I say this because a oval-shaped 3" pipe (or slightly crushed) will provide a similar flow to a rounded 2.5" pipe. The passenger side pipes then become the drivers side pipes directly after, and the drivers side pipe is already inherently longer than the passenger side, and then swing the drivers pipe to the passenger side near the rear muffler/back-box to merge them, and route the drivers side pipe back to the drivers side piping.

^^that could actually work, because of two fold reasons:

1) you are reducing the "drivers side" length overall
2) you are increasing the "passenger side" length overall