Standard Main Jet #81 HO122-81 Product:1/4-32" Thread, .0920" Hole Size (Pair) They are designed to suit

They are designed to suit either the Pistol or the Attack Bang Shift shifters

Split Mono Leaf SpringSuit Ford XR-XD Falcon -1"

72 RatioSuit GM LS3/L99/L76/L92 Rectangle Port Heads

Suit: Ford Falcon FG 5

Standard Main Jet #81 HO122-81 Product:1/4-32" Thread, .0920" Hole Size (Pair) They are designed to suitStandard Main Jet #811 4 32" Thread, . 0920" Hole Size (Pair) HO122 81 122 81 These metering orifices control fuel flow into the metering system. They are rated in flow capacity "cubic centimetres per minute" and are changeable for tuning purposes. The shape of the entry, exit, and size determines flow. All Holley Main Jets are flow tested and then stamped with the correct number.