Im going to install my Pure Polaris Eseries(white Bros) exhaust tomarrow and wanted to see how everyone else runs them.I guess i dont just take it out of the package and put it on like it comes?The spark arrester is the nice looking piece that comes on the end,correct?The silencer is the piece that does not come installed,correct?Do you use the silencer?Where does it go on at?How many discs for best performance?Thanks