Holley upgraded their two most popular sizes of double pumper with electric chokes. The Double Pumper is designed for use on lightweight vehicles with a manual transmission or an automatic transmission with a high stall and low rear end gears.
Holley 4150/4779/750cfm competition drag racing double pumper carburetor
Holley 0-80803BKX 750CFM Ultra XP Carburetor
Holley Carburetor 0-80803HBX; Ultra XP 750cfm Mech Sec, No Choke, Black/Gray
Holley Carburetor 0-3310C; Original Performance 750cfm Vacuum Gold Dichromate
Holley Carburetor 0-80508S; Classic 750cfm 4bbl, Vac Sec, Elec Choke, Shiny
Holley Carburetor 0-80459SA; Classic 750cfm, Vac Sec, Elec Choke, Shiny
