Holley Standard Main Jets . Size 40 # HO122-40 Rate_10 Requires Water Pump Housing with

Requires Water Pump Housing with Thermostat Housing Parallel to Radiator

Chevy Small Block

Crossover Pipe Included:No

Metering Block or Plate Gaskets Included

Holley Standard Main Jets . Size 40 # HO122-40 Rate_10 Requires Water Pump Housing withHolley 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.