These stainless steel tanks are designed to retro fit a Fuel injected motor in a 1967-68 Mustang Fastback. System Includes an installed fuel pump, ready to run. Fuel Pump Specs: Supports up to 550 HP. @ 13.5 volts pump is rated for 51 PSI and will flow 41GPH. (155.2 LPH) Replacement AC Delco fuel pumps are readily available at your local GM dealer, GM part number EP381. Pump sits in separate chamber within the tank to eliminate starvation during low tank levels. All tanks are baffled to control fuel tank slosh. Works just like an O.E. in tank system and features -8 A.N. supply and -6 A.N. Return. Power is transferred to the pump via the electrical terminals located at the top of the injection provision. In-tank pump for fuel injection that works like an O.E. System which means added reliability. All Injected tanks have a -8 Supply and -6 Return. Note: Any interruption in fuel flow will cause an injected motor to stall. With the Rick’s Hot Rod Shop Fuel Pump Chamber this will eliminate any interruption in flow. Please allow 4-6 weeks for delivery