Hey guys... I was just wondering, what exactly is different between the vafc and the safc from apexi... i know the vafc has vtec engagement adjustment, but does the safc also? Another thing: on what type of set-up would this be useful? Does it significantly help your engines' output? Any opinions/help is appreciated... thanks.

to my knowledge thats the onle diff. 1 control vtec and 1 dont. and it has to tuned on a dyno to get the best power gains and it helps through out the hole powerband if tuned correctly