Hi all, Sorry to be a bother with another thread, but I had a search and found a few answers to my questions, but obviously being an XR6T site, most of the answers related to the XR6T and I just want to make sure I get things right. I want to upgrade the exhaust on the F6, I want it to be a little bit louder than stock, but dont want it overly stupidly loud, but I want a noticeable performance upgrade as well. My thoughts were a 4" dump pipe, high flow 4" in cat, then 3.5" cat back with probably two mufflers, then out the back twin 3" pipes. Question is, if I upgrade the exhaust, am I going to need to do anything else, such as injectors, re-tune it etc etc? Or if I do that exhaust, will it run fine? My end plans are to do the injectors, flashtune, bigger fmic etc, but doing it one bit at a time. Thanks it advance