Moroso Vacuum Pump Regulator w/ Easy Adjustable Knob 39000509 This line features a 3/8"

This line features a 3/8" hose end and a 5/8 - 18 inverted flare fitting

They fit the valve stems well and can be removed with relative ease because of a tiny hole to relieve the suction created when removing the lash cap

1973-1973 GMC Jimmy

1967-1977 Pontiac Grand Prix

Moroso Vacuum Pump Regulator w/ Easy Adjustable Knob 39000509 This line features a 3/8"Product Description: Vacuum Pump Regulator 12 AN Inlet Adjustable Billet Aluminum Clear Anodized Sold Individually Moroso Performance Products is one of the worlds most respected suppliers of automotive equipment for racing and street performance applications. Moroso manufactures over 4000 products, from oil pans and oiling systems, to ignition wire, ignition components, valve covers, fuel system equipment, air cleaners, hard core racing tools,