i want to do some engine modding for my car, but i want to know which of these mods are for high performance engines, like racing applications, rather than for an everyday driving car looking for some power gains, or does it really matter?
throttle body, intake manifold, fuel rail, fuel pump, cam gears, pullys, ECU Modules...
so which of these belong in which catagory?

 

all of those would come into play. F series can take a good amt of boost on stock internals as long as you get your stuff PROPERLY tuned.

 

so what if i had all of these on my everyday driving car?

 

mods that are intended for racing and you plan on doing daily driving.... that means poor mpg