hi guys I’m new to this forum, too any for that matter. My 07 gt since I’ve owned it (3 months) has had no power past 1/4 throttle... if your driving under 1/4 it doesn’t show any issues. Anything past it kind of plateau’s and barely pulls. No jerking of any kind . I have changed spark plugs and fuel filter, cleaned throttle bottle and intake manifold. Car has LT headers high flow cats 4 new o2 sensors and a tuner set back to stock setting till I figure out the issue . Fuel pressure stays good throughout rpm according to my scan tool. Fuel trims are positive anywhere from 5-10% around idle and as high as 20% through rpm range . Any help guys ?