Yes they say the closer to spray right on the intake valve the better, I have good spots on three runners it's just the one on the right has the water jacket on it making it a headache, I am going progressive this year with a diy standalone nitrous fuel cell, on c16. I've done 150 straight single fogger, but my slicks couldn't hold it, and there where signs of detonation on the number 4 plug, so I'm gonna try 200shot jets this time around, I'll keep yas updated it'll be slow as I do a lot of snowmobiling over the winter...