They do sound good. but like I said it's not as loud as the fiat. I have a DC sports CAI and the res delete. it sounds good to me I hear the CAI more than the exhaust.
All I did to my exhaust, chop off the resonator weld up a straight pipe, can barely hear it inside the cab, but sounds good when you Rev it or when I down shift. In my opinion it sounds a little bit quieter then a stock fiat arbath