Well, my 4.56 gears will be installed in the near future and after that im basically done with the car. I have the aem v2 intake, t1r 70 exhaust, and thats about it for the engine. I want to do one last performance mod before i basically call it quits for the most part. I have been considering doing a V-AFC to tweak the engine a little bit, but id rather not play with the electronics of the engine becase ive heard about damaging the engine, and some users have said there are minimal gains from the vafc on 2002+ cars ( https://www.s2ki.com/forums/index.ph...T&f=1&t=96299)
anyways on to my question, if i was to just do one last mod for my car what would yield the most gains? maybe a header? or would the vafc be better?. Ive also been considering the hondata gasket, but it seems very labor intensive and i wouldnt want to do it myself. any other mods you would reccomend would be appriciated. please let me know.
thanks
Chris.

 

You have the most powerful intake and exhaust/testpipe.
Either get the VAFC dyno tuned (can yield good power) or a J's header.

 

as for headers what about ricks? it seems alot more reasonable than j's, Toda, and other jdm and the gains seem similar. Is this an alternative, or are the JDM products better for my setup? thanks.

 

I'd use a Test pipe and the J's header if I were you. I've also done a lot of research on the Hondata Gasket, and if you live in a hot climate, I think you'll find that to be very effective.

 

its rearley above 80 where i live ever, some people have said there is 10+ hp to be gained by getting the gasket. the t1r 70 system comes with a test pipe also btw./

 

Yeah I know, I figured you weren't using it being a Cali resident an all. I think the J's Header mounted to your 70mm exhaust will free up a few more ponies.

 

i think you need a couple more mods...

j's header, test pipe, and aem ems......