I finally scored a full M4 system for my franken exhaust project in which I'll be using the M4 headers with GSXR1000 cans flanged on. The goal is to get the most out of my new mildly built engine and airbox. I'm certain that I'm not the only one that's had to put stock cans or bolt ons onto a full system for local sound regulations or track sound requirements. How'd you do it? I was thinking of hacking up my stock headers for it or something similar.