The blue pump #12802 is rated at 110 GPH (free flow) and 88 GPH at 9 PSI. Pressure is pre-set at 14 PSI and a regulator is included as part of the package. Neither pump is compatible with methanol or alcohol fuels nor should they be used with fuel injection systems. *Not legal for sale or use in California on vehicles originally equipped with a 2 barrel carburetor for which there was no 4 barrel option.**Highly recommended to be used with Holley Safety Shut-off Switch, Part #12810.