I was referring to power adders. You have a 65mm pulley, cai, tune, manifolds, which is what I recommended to him. I have the same stuff, except I don't have the manifolds yet. Your other mods enhance your power adders, which is what you want. I was talking about adding more power through the 185mm, 62mm, stacking, etc. I see threads all the time about not being able to get timing or a/f right with these pulleys. I don't see this with people that just have the 65, cai, and tune.