When I had my Z370, I tried, and tried, and tried, and waited, and waited, and waited, and called, and called, and called, and waited, and waited, and waited....for them to sell me the dual carb kit they advertised and got NOTHING, NOTHING, NOTHING from them. As far as I'm concerned, they can kiss my... Talk about vapor-ware. I doubt they ever even made the dang kit.