Carburetor Standard Main Jet - 122-40 featured Baseplate designed with a boss

Baseplate designed with a boss that can be consumer machined for vacuum source

2 V8 2008 - 2009 Hummer H3 Alpha 325/5

Coupling this Hi-Ram intake with the high flowing LS1/LS2/LS6 style cylinder heads has outstanding potential for N/A and forced induction applications at a budget-minded cost

Fuel Line  For 68-70 Ford Mustang 8 Cylinder Front 3/8 Inch Steel

Carburetor Standard Main Jet - 122-40 featured Baseplate designed with a bossOverview: 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 &