Holley Standard Main Jets . Size 66 # HO122-66 Rate_10 647 Exhaust248 Intake / 254

647 Exhaust248 Intake / 254 Exhaust duration@

465HP Long Block Crate Engine BPC4085CT

Note: Fluidampr balancer requires

Primary Outer Air Bleed Sizes Included:

They're calibrated to give you the performance that you need

Holley Standard Main Jets . Size 66 # HO122-66 Rate_10 647 Exhaust248 Intake / 254Holley Standard Main Jets . Size 66 # HO122 66 GENUINE HOLLEY STANDARD MAIN JETS. SALE 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.