running a t3/t4 gsr set up and am about to get it tune with crome in spring, i happen to pick up a vafc for super cheap and found that i have no use for it, after tuned, is this pretty much junk or can it help? what bout the vtec control feature? where can i go to get good instructions for installation?

 

After your tune, it's basically useless. I'm not sure if Crome has Vtec crossover point changeability. If not, then there you go, you can use it for that.

The Apexi site has good instructions for pretty much every one of their products in PDF format. Check it out.