You could have a body shop mold out a new spot on the left for the other muffler, and if you got 2 carbon fiber mufflers (Karbonlite, thats what I have) they only weigh a couple of pounds, not to mention you can practically hold them rigth after you've been driving for a few hours. Also, that is not the gas tank you are thinking of, its the spare tire well, the gas tank is in front of that. You could do it...