Holley Standard Main Jets . Size 40 # HO122-40 Rate_20 Systems automatically compensate for altitude

Systems automatically compensate for altitude and weather changes E-Tuner 4 app with Bluetooth connectivity between ECU and Android phone or tablet

Valve Guide Material:

Tube Material

Hooker Aero Chamber Muffler 2 1/4"

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

Holley Standard Main Jets . Size 40 # HO122-40 Rate_20 Systems automatically compensate for altitudeHolley 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.