Standard Main Jet #59 HO122-59 Pitman Arms The LED lights will illuminate

The LED lights will illuminate when you reach your shift point and flash when this RPM is exceeded

AF818-12BLK

EA445445006535

Billet LS Throttle BodyBlack 105mm With Low RPM Taper

& 12 cylinder engines with points

Standard Main Jet #59 HO122-59 Pitman Arms The LED lights will illuminateStandard Main Jet #591 4 32" Thread, . 058" Hole Size (Pair) HO122 59 122 59 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.