Cruiser - the Bub website says you don't have to rejet. I haven't rejetted - I get better gas mileage and way better performance with the Bubs than with the stock pipes. Some guys, however, have rejetted and if I remember correctly, there was some reported improvement in performance...
Hey Freedom - you asked about the sound of your Epco's - I remember listening to them and thinking how great they sounded. While I went by
But folks, don't believe all Freedom's stories - Friar John and I really had our work cut out (at least I did) staying with him in the twisty bits!
