At 765 it's less than 200 dollars cheaper than the massives. Add ducts and in/out mod and they are more expensive than massives w/ ducts and don't flow as well. Zgene4 had the best deal I had seen in a while which was ~725 shipped for modded Stillens. Even at that though if you wanted to add Stillen ducts it costs about the same as buying the massives brand new with ducts. I understand not everyone can shell out 1k for IC's but it's ridiculous to turn around and spend 700-900 on an inferior product. If you must do it on the cheap order factory direct and get the same IC's as Z1's and AVS's for ~200. Or find a name brand used set for less than 500, anything over that and you are better off saving for massives.