I have the ford racing pulley and exhaust. Comes with program for changing the tune. Nearest dyno quite some distance and not sure I can find someone with GT experience for custom tune. I run 93 octane. Is it possible to get a preprogrammed tune to take in to account the exhaust and 0ctane ? I have a subaru sti with a cobb tune with is programmable for different modifications and octane. I realize a custom tune with an experienced GT tuner would be best but not always an easy option. I believe my setup is probably fairly common in the GT community.