I have a '82 xs400 j maxim twin cam. I want to cut my mufflers off and leave the pipes like that to make it louder. Mainly so cars can hear me and so it will be louder than my girlfriends 150cc scooter. My concern is back pressure and if I will damage anything or loose power by doing this. The other option is to do a 2-1 header with a slip on, maybe, but Im pretty broke. Please help!