Well, it's quiet, pretty much the only positive thing I can say about this. It tested at 100db, and that is with the db meter missing the large foam cover for the mic. With the foam it'll be 98db at the most. Performance wise it sucks a monkeys butt!!! Last fall when I got it, with the unmolested FMF pipe/silencer, 340 main 30 pilot it was a terror on the track. Yesterday with the 340/30 jets, wrapped pipe and '85 silencer I think I could go faster on my buddies kids badger 80. Granted it was 90 degrees outside with 80 percent humidity. I know I'll have to rejet to much lower mains cause of the gayass silencer. Couldn't get it to hit on the pipe at all, it ran pretty well kinda up to third throttle, but after that it was still way to fat. It is not the same quad it was before, for sure, not close. I don't know if its even worth messing with anymore, until winter. Last fall before the mods it ripped, but come winter and -20 to 20 degrees it was an absolute beast, man it loved the cold. I think I might just put the 40 pilot and like a 380 main jet in it, put the lowering stuffs and sway bar back on and pit it back in the barn. Wait till theres ice, hopefully early this year, put the ice tires on, bring sum tools and the jet box down to the ice and let the nitemare begin. At least I got it quiet.