There is one adjustment screw on the back of the barrel valve to make idle fuel system adjustments allowing simple changes without changing he barrel valve linkage. That's right just twist the enrichment screw and make your adjustment and your done.
Barrel valve is anodized and assm. includes fittings to be used with the barrel valve system. Mounts in standard injector locations using two 1/4 studs and uses standard barrel valve linkage. This barrel valve has a -10 in and a -12 out.
RBS carries a full line of rebuild parts for the barrel valve as well.