Carburetor Standard Main Jet - 122-101 RearLines This ensures plenty of power

This ensures plenty of power in the high rpm's for continued acceleration in the straights or for shifting back into the healthiest portion of the power band at the drag strip

Opens the factory exhaust valves

All Wheel ABS / AWABS

Extended Cab/SuperCab with Long Bed (8 ft)

2 3/8" Secondary

Carburetor Standard Main Jet - 122-101 RearLines This ensures plenty of powerOverview: 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 &