THE BOOST BOTTLE IS MAINLY FOR LOOKS. I PUT MINE ON WHEN THE SHEE WAS STOCK,IT HAD BETTER THROTTLE RESPONSE. WITH PIPES AND MODS IT MAKES MY SHEE REV OUT MORE ON TOP. I LISTENED TO THE GUYS ON THE H.Q. AND TOOK THE BOTTLE OFF. NOW I HAVE THE BALANCE PIPE BACK ON AND I HAVE BETTER BOTTOM END, ISN'T THAT WHAT WERE ALL LOOKING FOR.