Carburetor Standard Main Jet - 122-81 wheels The design offers superb engine

The design offers superb engine visibility to show off your horsepower

6 V8 2007 Chevrolet Silverado 2500 HD Classic 403/6

4 V8 2008 - 2010 Ford F-350 Super Duty 391/6

Connects After Factory Catalytic Converter

Base Style 4150 Brand Holley Emission Code 3 Filter Diameter 16" Filter Height 4" Filter Type Red Washable Finish Chrome Logo None Material Stamped Steel Product Type Air Cleaner Size 16" Warranty Limited 90 Day

Carburetor Standard Main Jet - 122-81 wheels The design offers superb engineOverview: 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 &