I just put a Magnaflow muffler on after deleting the resonator and factory muffler. The muffler shop put a 4" inlet from the factory Y pipe. The muffler then exits with dual 3" that are angled downward just behind the rear bumper. It is Loud when I get on it with a nice deep tone. It does have a substantial drone around the 1800 - 2000 rpm range. While traveling, I can do 75mph with minimal drone in 6th gear or any slower than 75 and I keep it in 5th gear.