I'll take a look under the car, just got the car yesterday so haven't explored the whole thing yet, but on one my first cars deleting the resonator and putting a straight pipe made a noticeable difference in sound in and out. I looked under the car earlier today, there's looks to be two mufflers, one at the back and another towards the front, I'd have to lift it up to get a better look, so I think the back one can be deleted, but don't know if it would affect performance at all. For now I'll keep my exhaust stock since I barely have any miles on mine.