Holley Main Jet Extension (HO122-5000) bearing Features a heavier Diaphragm pressure

Features a heavier Diaphragm pressure plate which will have between 25-30% more clamp load over standard specifications

AF6010-4000

and LS 4-bolt throttle bodies

HO20-78 - PLASTIC 30cc ACC PUMP LEVER

It features a compact 39mm diameter that fits most applications and an offset inlet design that eases installation

Holley Main Jet Extension (HO122-5000) bearing Features a heavier Diaphragm pressureHO122 5000 HOLLEY MAIN JET EXTENTIONS,2PK Suit 1 4 32 Thread (Pair) Part Number: HO122 5000 An improved jet extension design that actually screws into the metering block. The main metering jet then threads into the end of the extension. The installation effectively moves the fuel entry point for the main jet out into the fuel bowl. In this location it cannot be uncovered by fuel, causing a lean condition, during periods of hard acceleration or