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, Regulator has a 3/8 NPT tapped fuel pressure gauge port, Chrome steel construction. Holley 12-804 Adjustable Fuel Pressure Regulator w/0-15 PSI Gauge. (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. Comes complete with a 3/8 fuel line adapter for a fast, easy installation. By grampy on March 11, 2021. This was needed to help my carb keep from flooding. Yes, I recommend this product. 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.