Long story-Short--- No, there are no current exhaust options I am aware of for 2013. If there was it would be from DPF and back, and this would most likely not change your exhaust note enough to be anywhere near worth the money. (ok, semi-short)
EDIT - if you want a different sound, look into a cold air intake. Not much HP, but I like the sound.
EDIT - if you want a different sound, look into a cold air intake. Not much HP, but I like the sound.