I had the RS-3 Titanium Race baffled slip ons on my other busa. Really deep note. Got really loud when you got on it. Best sound imho.
The "zyclones" are crap in my opinion. My friend has them on his and it sounds like a sewing machine. It's all about what you like, I guess.
My suggestion, is trade them for some race baffled ones or pull the baffles completely out.