injector size?

[mikeyzx6r]

ok guys i know this has came up before but how do i know when i need new injectors i just got my heads cam and intake do i need new injectors? the heads are gt 40 irons intake is gt 40 tubular intake and the steeda 19 cam and with those mods what kinda hp numbers am i looking at
thanks-

 

[2002BLGT]

ok guys i know this has came up before but how do i know when i need new injectors i just got my heads cam and intake do i need new injectors? the heads are gt 40 irons intake is gt 40 tubular intake and the steeda 19 cam and with those mods what kinda hp numbers am i looking at
thanks-

Not absolutely necessary , but wouldnt hurt to put 24s in