Kit Includes: (1) Holley 12-804 Adjustable Fuel Pressure Regulator, 1-4 PSI. (1) Mr Gasket 1564 Fuel Pressure Gauge, 0-15 PSI. Holley 12-804 Adjustable Fuel Pressure Regulator, 1-4 PSI This Holley universal low pressure fuel regulator is factory-set to 2.7 PSI, but is fully adjustable from 1 to 4 PSI. Use with standard pump only - not recommended for maximum pressure pumps. Fuel pressure regulator includes mounting bracket with 2 each self-tapping screws for regulator to bracket installation purposes and 3 screws for bracket to vehicle installation. Mr Gasket 1564 Fuel Pressure Gauge, 0-15 PSI 0-15 PSI. Comes complete with a 3/8" fuel line adapter for a fast, easy installation.