A friend is offering me an apexi safc2 for dirt cheap. i was wondering if its actually worth putting on my d16z6 with only an intake, header, and cat-back. what kind of gains would i get and would it help on gas? i would like other peoples results or ideas without the flaming.

 

Id say 3-5whp at the most. If you can get it cheap enough it would be worth it.

 

if i tuned it for fuel economy how many mpg would i gain?

 

well, economy and power are two different things, you might gain 1-2 whp or possibly lose a few.