Holley Main Jet Extension

The Holley Main Jet Extension is designed to screw into the metering block allowing the main metering jet to be threaded into the end. This moves the main jet fuel entry point out into the fuel bowl where it cannot be uncovered by fuel and cause a lean condition during hard acceleration or braking.

Installation Notes:
Requires the use of special "notched" float 510-116-11 to achieve proper clearance and to operate properly. A notched float kit 510-116-10 with float and extensions is also available.