It's easy to overcomplicate a fuel system, but this one is simple. Fuel from the tank enters the 100-micron filter (PN 12304) on the left then pulled through the pump into a 10-micron filter (PN 12301) before going to the bypass regulator (PN 13109). The return off the bottom of the regulator sends the unused fuel back to the gas tank. The pump (PN 11106) is Aeromotive's new billet in-line deal that is rated up to 700 hp in naturally aspirated applications. In some cases an EFI gas tank is required, but due to Mary's driving habits, her tank was already equipped with baffles and a port for the return line.