tuning questions.
 

hi i have a 09 Nismo with Ark Grip Exhaust, Motordyne Art Pipes, and Injen Cold Air Intakes, will it be worth it if i have it tuned with my current set up? or do i need a headers first?

and if i have it tuned with my current set up right now how much Hp gain could i possibly add? thanks

I guess ill take a stab at it first...

Yes it'll be worth it.

You don't NEED headers first. You don't NEED headers at all.

Will you see a higher number if you have headers + your parts + a tune.. yes.

09 nismo puts down baseline 285-295whp + mods w/o headers = guessing 308-315