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The Holley 12-840 fuel pressure regulator features 3/8" NPT in/out ports
**10-inch design that bolts to original OEM flywheel pattern
Great for single turbo conversions or head drain kits
Nissan Skyline R32 Turbo
NGK Spark Plug - BCPR7ES
Holley Standard Main Jet #150 (HO122-150) Fuel Pumps - Mechanical The Holley 12-840 fuel pressureHO122 150 HOLLEY MAIN JET # . 150 5 16 32" Thread, . 150" Drill Size (Pair) Part Number: HO122 150 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.
