Just got back the SC GT with JBA shorty headers installed! My butt dyno cant tell if there is more power, however the GT and Vortech blower sure seem to like them!! Smoother power and throttle response is very noticable! I plan on doing a dyno run next week to see if im making more horses. The GT is already making 390RWHP so well see if the JBA's were worth selling my first born child for! lololol!