Holley Standard Main Jets . Size 40 # HO122-40 Rate_20 Valve Guide Material:

Valve Guide Material:

The kits also include detailed instructions to help you do it right the first time

If you have an electric water pump use a crank pulley for short water pump likeBBCS1CR

Edelbrock AVS2 Series Carburetor Calibration Kit # ED1948

Holley Standard Main Jets . Size 40 # HO122-40 Rate_20 Valve Guide Material:Holley Standard Main Jets . Size 40 # HO122 40 ENUINE HOLLEY STANDARD MAIN JETS. SIZE 40SALE IS FOR A PACKET OF 2 JETS. Fine tune your carburetor for street or race conditions. These Holley standard main jets are just what you need to fine tune your carburetor for street or race. Threaded for easy installation and removal, Holley jets are manufactured to high tolerances for consistency.