the suggestion was mine- cut through factory welds holding halves together- cut out factory baffles- reweld together- my 01 box has been like this for years- yeah its a little louder, but not any louder than most other modded boats- never had any noise complaints- only compliments that it sounds good- on my boat (ported 760, 44s, high comp, rad flywheel, vf2s, bpipe) it felt like it revved out harder and faster- yeah ive heard of backpressure, but i dont see on a modded boat how removing all that downstream restriction could not help- just my opinion from an ACTUAL FIRSTHAND LONGTERM EXPERIENCE.