Standard Main Jet #74 HO122-74 Product:1/4-32" Thread, .0800" Hole Size (Pair) For applications with center bolt

For applications with center bolt valve covers

Z-Series Oil Pressure Gauge 2634 AU2634 2-1/16"

RS035356517N

90° NPT Female to Male NPT Fitting 3/4"Blue Finish

Standard Main Jet #74 HO122-74 Product:1/4-32" Thread, .0800" Hole Size (Pair) For applications with center boltStandard Main Jet #741 4 32" Thread, . 0800" Hole Size (Pair) HO122 74 122 74 These metering orifices control fuel flow into the metering system. They are rated in flow capacity "cubic centimetres per minute" and are changeable for tuning purposes. The shape of the entry, exit, and size determines flow. All Holley Main Jets are flow tested and then stamped with the correct number.