I would say the left side is in close. Should not be a big effort. I would suggest loosening the left side muffler clamp. If the rear hanger is like the OEM set up it is on a rubber bush so no need for any tools there. Then grasp the left muffler from the rear. Rotate it out, like clockwise a bit. Make both sides look similar and tighten the previously loosened clamp. Of course you could adjust either side to find the middle point.
