Is the sound the only thing that will change by putting one of these on a pretty much stock engine? and how will it make it sound compared to the factory box?, thanks. I'm not that keen on wrenching on, or adding mods to watercraft, just now starting to do it since I have my own ski now, I'm used to the 250R's, Banshees, CR's, and Kx's, so it'll take me a while to catch on to the watertoys