I just had Vance and Hines straight shots installed on my 2002 Espfi Fatboy - I don't plan on changing anything else - if I can get by with it. The pipes sound great - there seems to be no power loss -(actually seems to have gained a little) and the bike runs great. Do I need to have the stage 1 chip installed? Why? or why not? If I go to a screaming eagle air cleaner later - I will get the stage 1 chip and have my bike recalibrated, but everyting seems to be working fine now. My stock head pipes turned blue after the 1st 50 miles - (lean) but i've been told this is normal. I don't want to do any harm to the bike, but I don't want to waist money either. Any help would be appreciated.