Carburetor Standard Main Jet - 122-51 calipers-and-parts Designed for LT Engine Swap

Designed for LT Engine Swap Installations in Classic Car and Truck Chassis Requiring More Oil Pan to Chassis Clearance Around the Front Half of the Oil Pan

3/8 in diameter

2011-2019 GMC Sierra 3500 HD 364 CID

Outlet:  ID 1 3/4"

Carburetor Standard Main Jet - 122-51 calipers-and-parts Designed for LT Engine SwapOverview: 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 &