Thanks for all the replies. I should have clarified that I already have Akrapovic bolt-ons and the Puig double bubble. I don't plan on anything else cosmetic except the undertail. The only reason I was thinking the PCIII is now with the bolt-ons, at around 4000 rpm's or so, I can hear some light poping noise from the exhaust. I guess I just need to know if I can do the pair mod and use the pcIII without spending a couple of hundred on dyno tuning right now. How will it run with the PCIII and the pair removed without a custom map? If it's gonna run like sh!t then I'll wait on the pair mod.