Holley 121-131: 121-131 Straight Nozzle Hole size .031"
Straight Nozzles *For 4150/4160/4500 carbs
Straight Nozzle Hole size .031'' Hollow nozzle screw NOT included
Straight Nozzles *For 4150/4160/4500 carbs
Straight Nozzle Hole size .031'' Hollow nozzle screw NOT included