I cut open my collector box today. Removed all from inside and cut center piece out and welded back...I had a used set of Jardines exhaust so i cut them open and removed baffles.......My bud does chrome work and is going to rechrome........My Question is does the venture need back pressure???????????I'm trying to make it louder but don't want to hurt engine? Any input would be HELPFULL!!!!!!!!!!!!!!!! THANKS DENNY:stirthepot: