Without tearing into the motor where if the power hiding in a 4.6 sohc in a 01 f150 2wd at?
CAI how much to expect for $225?

Chip- changing a a/f curve, timing to unlock how much potertial?

Exhaust- Talking a complete system headers to x-pipe glasspacks no cats

Realisticly these are prob best done together who's done the mods what did you find?

 

CAI-nothing
Chip-10-20BHP
Exhaust with long tube headers will be noticeable but I don't know how much hp.

Electric Fans and a tuner are the best bang for the buck aside from Nitrous of course

 

Galaxie64's right-there's nothing to be gained by a CAI on a 2V 4.6L-NOTHING. The biggest restriction on the 2V 4.6L truck engine is the intake manifold itself,but it's designed that way to build cylinder filling air velocity for low-RPM torque production.
"Chipping" one will yield some power,but not alot-more in the way of better transmission control,and better economy when cruising. Exhaust will gain a little,but only minimal,and nowhere near enough to be worth the cost of a full system with headers.
The most effective mods would be an electric fan setup,flash tuner(Chip),and 4.10-4.30 gears.
JL

 

^^^I agree with what he said. Only LT's will yield a noticable power increase but very pricey.....just a stand alone cat back exhaust will help, but not very much.

 

Gears will give you a noticable "increase" in power... esp. if you have larger tires or tow.