After going FI, I added a spacer and lost about 5 wtq and 1whp. IMO the difference could have been the weather or humidity... but in all honesty it isn't going to do squat for you when you're FI, only mild NA gains. For FI you should be looking at an aftermarket plenum, but again these aren't going to do much for you until you're more than 500whp.

Thanks

 

is it worth it with a vortech v3 s/c?