The HP billet mechanical pumps are constructed from CNC machined 6061ÔÇôT6 aluminum to provide the utmost strength and superior looks. The HP pumps feature a CNC billet aluminum finish for long lasting good looks. The HP series also feature ÔÇô8 AN inlet and outlet fittings already installed. The base can be rotated independently from the top so it can be tailored to your application. The HP series has a freeÔÇôflow number of 170GPH and a preÔÇôset idle fuel pressure of 7.5PSI. No regulator is required.