It's a secondary injector setup they copied from jenvey and kinsler. The optimal spray pattern is above te throttle plate.

Itbs are the most overrated mod in my opinion. They are a pain to tune, you don't make 20whp like a bunch of people think, they do add good midrange power but the cost per hp is not for most people.

I made 230+ with a lightly ported $120 aebs manifold and 70mm tb.

Unless your making 240-250 , or a avid road racer, they are a waste of money