The HP Billet Mechanical Pumps are constructed from CNC machined 6061-T6 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 -8 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 free-flow number of 170GPH and a pre-set idle fuel pressure of 7.5PSI. No regulator is required.