368 rwhp @5300 rpm sounds about right, although I don’t know how it got to 135mph. Get a Speed Cal on that thing. I definately think the low HP is due to the rev limiter problem you're seeing, not the motor itself. Kenne Bell chip does not modify the rev limiter. It also does not modify the Speed Limiter UNLESS you ask for it AND you sign a waiver form when you order. That said, I doubt very seriously that a differcne the CAI tube used would account for that big a difference in numbers. Get it to 6100 rpm and I bet the rwhp cranks right up. I’ve always heard that if you hear the exhaust pop and crackle you are probably running a rich. Mine is running a bit rich, as KB uses a conservative tune (for safety I assume) and it pops during downshifting and deceleration some. 2000 GT’s with 16” stock rims had a 120mph speed limiter. Most new Mustangs are already set at 180mph. Our 2V kit BAP’s don’t come with that regulator knob due to the new BAP method KB uses. As for fuel press, at idle you should usually read around 30psi. As you get on it, even a little, the press rises. Sometimes I have seen mine get up to 55+ in the hot weather. I’ve never seen it get below 30psi. Dan - no fear my man. There are many of us that have had zero problems. Whether it's because we didn't mix & match components I don't know, but I am using all the KB stuff such as the 90mm MAF, Big Tube, etc. I have not experianced any of the issues Red has had, nor what el_ is having, so I would say it's a matter of luck in some ways.