I would get it if you plan on upgrading turbos in the future. I have it on my stock twins, and didn't notice really any power gains, but I haven't been to the dyno to find out for sure either. Just one less thing to buy when the single shows up on the front step
b/c I'm planning on picking up the s-afc, vpc, fmic, cam gears and the nos <~ don't know yet. But yeah. Oh also, what's better to go w/ the gcc or the s-afc?
I have the s-afs and love the adjustability! Of course the GCC is the same brand as the VPC and may work a little better but who really knows....it is just modifying a voltage after all.
It gained 24rwhp on the dyno with it zeroed out and car still running super rich but it also held hp all the way to redline which was way better than before the VPC.