I really doubt my car is making 280hp, probably much closer to 260hp.
The CAI won't pick up more than 1-2hp over a standard K&N with removed silencer, but removing the silencer will give you 5. Probably near 10hp for silencer removal, and the conical K&N cold air.
The electric fan will give you 10hp easy. Pushing that big fan assembly at higher rpms really takes some power!!
I believe Dustin picked up 20hp pretty easy with his Bassani X pipe installation, so that's for real.
The aftermarket MAF will get you about 5hp, it measures flow better, and it allows for less restriction.
I can't say the T/B is all that important, but as long as it's not bigger than 65mm, it shouldn't hurt.
As far as the aftermarket intakes, hey guy's read his post again. He's already got an EXTRUDE HONED STOCK intake. That flows pretty close to the Cobra. It's true without heads the intakes gains are going to be pretty small, but, like I said, some GT-40's or P's will get him the benefits of that combo.
As far as the cam, or the rockers, I really doubt they are all that necessary. The HO cam will do fine to get 300hp. It's more aggressive than a lot of people give it credit for, it doesn't matter if it idles smooth

. A lot of guys get their Fox into the 12's with that cam.
So let's start from the beginning.
225hp+
GT-40p's with Extrude honed stocker 255hp
Hi flow H pipe and exhaust 275
MAF 280
CAI 290
Electric fans 300
I think that's a pretty conservative expectation as well.