Adjustable from 1-6 psi, Includes barbed fittings for use with 1/4″, 5/16″, or 3/8 fuel hose, For use with carburetor fuel systems only & engines not exceeding 400 HP, Select desired pressure settings via selector knob located on top of regulator. Mr Gasket 9710 Adjustable Fuel Pressure Regulator w/1564 Gauge. (1) Mr Gasket 1564 Fuel Pressure Gauge, 0-15 PSI. (1) Mr Gasket 9710 Adjustable Fuel Pressure Regulator, 1-6 PSI. Mr Gasket 1564 Fuel Pressure Gauge, 0-15 PSI. Liquid filled to resist vibrations. Comes complete with a 3/8 fuel line adapter for a fast, easy installation. Mr Gasket 9710 Adjustable Fuel Pressure Regulator, 1-6 PSI. Easily Select Pressure Settings. Easy – Quick Installation. Fits 1/4″, 5/16″, or 3/8 Fuel Hoses. Adjustable Pressure from 1 to 6 psi. Great product, everything needed is included. By Paul on November 23, 2021. Had to regulate my stromberg 97s. Speedway Motors is America’s Oldest Speed Shop® and has been a trusted source for specialty rodding and racing products and friendly expert advice for more than 72 years.