I have RPW exhaust. And, it is a really nice deep tone. What I would describe as a muscle car sound. I have the performance air filter, and stage 1 ECM flash. But, I had some popping at first, so I disconnected the O2 senors, and that cleared up 90% of the popping. There is only a little popping on really hard accel or deccel... I will remove the air filter strip at the next service or when my Dad is in town to lend an extra set of hands on the tank, so I don't break the nipple off the fuel pump...
2013 XC Sunset Red
21" Ness Evil 7 Wheels
Tri-Oval Exhaust + Llyodz Air Box + PC-V
Tubular Highway Bars + bag rails
Digital Guard Dawg Keyless Ignition