Carburetor Standard Main Jet - 122-53 fans-and-shrouds 76 mm to 60 mm

76 mm to 60 mm reducer

Transmission Type FMX Transmission

6L V8 1970 - 1972 GMC K15/K1500 Pickup 402/6

Calibrated for excellent street performance right out of the box

Carburetor Standard Main Jet - 122-53 fans-and-shrouds 76 mm to 60 mmOverview: These metering orifices control fuel flow into the metering system. They are rated in flow capacity "cubic centimeters 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. Click on Catalog Product Page for complete listing of jets and sizes. Features: Fits All Holley Model 2010, 2300, 4010, 4011, 4150, 4160 &