Notes: Red, Pro-Billet distributor. GM HEI distributors with 4-pin ignition module; Iron gear. This part is legal for sale and use on Emissions Controlled Vehicles when used in accordance with the manufacturers application guide because it has a California Air Resources Board CARB Executive Order EO number. The following vehicles are considered Emissions Controlled Vehicles 1966 and newer US manufactured California Certified vehicles 1968 and newer US manufactured Federally Certified vehicles 1968 and newer Foreign manufactured vehicle