Car is Sputtering

[justin1642]

ok today i was coming home from work and i was at 65mph and i dropped it in to 4th to pass on the freeway and then put into 5th at 80mph and the car started hesitating and sputtering it did it a little bit when i was accelerating now it does it all the time. it sputters now when i take off all the time and i didn't see any vaccum leaks, i don't know if it could be the valve cover gasket leaking into the spark plug holes, or if i need bigger fuel injectors.

my mods to help you out:
3in full exhaust from turbo back
cooleeze intake pipe and radiator pipe
blitz bov
intrax lowering springs
tokico shocks