just got one. quite idle. louder than mbrp and others but not really loud. sounds alright, then when you hammer on it, it ****in' rings! haha. sounds great. not as heavy as everyone says either. great product construction wise, great sound. deep at low range, then opens up to a good scream at WFO. I'll make a sound clip tomorrow when we go riding and i'll throw it on youtube. the only one i've heard on youtube is Robs sled from "Flatlanders Ride The Mointains". its a black Rev with a biohazard decal on the side panel, i make one though.
paid 200 for mine used. Best can around in my opinion. I've heard they make power at elevation. Al is a knowledgable guy, wouldnt doubt it, yesturday mine felt like a power gain, or mabey just a huge weight loss. or a cold motor. who knows, but i love it!