I'm pretty sure there isn't currently another 5.0 around that's any louder than mine. LT's off road x, factory resonators and muffler deletes. The best part is, it's relatively quiet just cruising, then you jump on it and all hell breaks loose! Video doesn't do it any justice, but here's a GoPro from Ohio last month (fast forward to :45 for the action) -
http://youtu.be/NZBeTuN0wQ8