Mark Whitener with Racing Fuel Systems in Florida totally redid my old 1300 Pro-Systems Dominator to bring it more up to date. It's now a 2-circuit design with all new boosters, metering blocks, jet design, bowls - actually the only thing that isn't new is the main casting. Hopefully this update will help with rich cold idle issues I was having, and help get a better fuel curve going down track. My old setup was getting fatter as RPM increased both on and off the bottle. I noticed Mean Dean Marinis uses the same color boosters and metering plates on his car. Hopefully that means this one will be fast also haha..