mine has pods and the VH supersport. I put a Dynajet stage 3 on mine. also took the fuel/air screws out 4 turns. It runs really well although I probably did not gain anything performance wise. The pods were already on it when I bought it so I do not have anything to compare performance against there. With the stage 3 I noticed the bike pulled a bit harder around 5000 RPM.. with the VH header I did not notice any difference in performance. It just sounds and looks better.
If you are looking for perfomance, the stock setup is probably better.