Sold as a rebuildable core The secondary is stiff because the spring on the accelerator pump arm is too stiff
Holley 4150/4779/750cfm competition drag racing double pumper carburetor
Edelbrock Carburetor 1307; VRS-4150 750cfm, No Choke, Mech Sec, Bead Blasted
Holley Carburetor Rebuild Kit 390 - 950CFM For Holley 4150 Carburetors
PRP 1361 Fuel Pressure Regulator Bracket Holley 4150 Carb + Holley Reg Made USA
Holley QFT CCS 134-108 Fuel Bowl Primary Center Hung Dichromate Holley 4150 4500
Holley EFI Throttle Lever 20-7; Throttle Extension for Mopar, Holley 4150/4160
