I am changing my pipes on my 2004 injected fayboy,currently I have the stock pipes with screamin eagle2 slipons(put on a hy-flow air filter kit when I installed the mufflers and had it put on the dyno to set the computer for max performance) I am going to install Vance and Hines bigshot staggards this weekend and I have a few questions,First will I have to have the computer reset again for best performance and can I expect much performance gain from these pipes. Also my TC is completly stock
Thanks,John | 
