custom tn

[frydog]

if i add any thing such as better under pulleys will i need a custom tn?
#2 if iadd turbo- or super crger certainly i would have to go custom.
what does standard air box mean that reads when i'm changing my performance tune?
i have factory shaker borla h-s-- cold air intake. my tunes have taken well
but if i make any other add ons what will i need to do .
thanks i hope you you don't mind trying to sort out this mess i think theres about 3 or 4 questions here i have to turn in now long ass day
thanks

[mikel]

1. No
2. Yes

The factory airbox means the one that came from Ford, if it is aftermarket, you need the correct tune for it.

Thanks

[frydog]

please reply so if i have the fac. shaker my perf. tunes arent correct?