Hey guys, i have 1999 F150 5.4 and ive gotten it up to about 280 HP with CAI and exhaust, so now im thinking about a tuner. ive looked at SCT, Superchips, and Hypertech. but it dosent say how much horsepower i would actually gain. So what is the best Tuner for a 1999 5.4 2 valve automatic. and how much horsepower should i realistically expect to gain.