2 nipples makes more sense than 3 or i. there were two connections to be made. one at the air cleaner and one at the fuel bowl vent. I dont care WHAT came from the factory. if it needs 2, I want two. if there was an additional vapor line, I'd get three.

right now I have the single. so where do I find the 2 nipple breather? my fuel bowl vent has been capped