Fitted my cone filter today, and it sounded exactly the same (if not worse), as the original air box, LOL
Removed it, and put the original one back in place. Will probably modify it later to see how it sounds....
By the way, everyone's saying that cone filters suck in hot air from the engine, but what about if you extend the pipe right to the offside fender, where is the original box's pipe that sucks the air?