Carburetor Standard Main Jet - 122-60 cold-air-intake 8L V8 1996 - 2009

8L V8 1996 - 2009 Porsche 911 Turbo 3

4L V8 1976 - 1977 GMC K25 Suburban 454/7

These Big Block Chevy Upright headers available in 2-1/4" tube diameters are ideal for even big cubic inch Big Block Chevy engines

5 volt charging systems and 80 psi

Flow FX "straight-through" performance muffler delivers a deep tone and improved exhaust flow

Carburetor Standard Main Jet - 122-60 cold-air-intake 8L V8 1996 - 2009Overview: 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 &