The Radium Engineering fuel pump hanger permits the use of 1, 2, or 3 aftermarket pumps in the stock MK4 Toyota Supra (JZA80) fuel tank. No permanent fuel access cover modification is required.  To simplifying aftermarket -AN hose plumbing, the 10AN ORB threaded feed port (depicted below) features a low profile 8AN male fitting and the 8AN ORB threaded return port features a low profile 6AN male fitting. Because the fuel pumps utilize integrated check valves, the pump outlets merge into a single 10AN billet collector (20-1511 includes check valves for pump outlets). To reconnect the OEM return and vent hoses, barb fittings are also included.  ELECTRICAL As shown below, the custom designed stainless electrical studs easily handle the high current demand that compact bulkhead connectors lack. These serviceable connections are properly sealed and impervious to all standard and exotic fuels. The low profile design keeps all wiring tucked nicely underneath the OEM fuel tank cover using the provided foam insulation.  Nonconductive acorn nuts are provided to prevent any accidental short circuits. Furthermore, the high quality in-tank wiring is insulated with chemically resistant ETFE. Electrical hardware is included for the fuel pump(s), OEM level sender, and OEM temperature sensor. Single pump applications can reuse the OEM fuel pump controller wiring, but it is recommended to upgrade the OEM wiring as these high flow fuel pumps draw additional current requiring larger gauge wire. Fuel pump wiring kits can be purchased HERE. Select qty 1 for single pump applications, qty 2 for dual pump applications, and qty 3 for triple pump applications. FUEL STARVATION One conclusion with the dated OEM system is poor protection against fuel starvation. The Radium Engineering system incorporates a unique siphon jet pump. Using a venturi-effect, this "mechanical" pump draws fuel from outside the sub-tank and distributes it directly to the pump inlets. As shown, the sub-tank stays full in all driving conditions. FEATURES-Drop-In OEM Replacement-Permits 1-3 Pumps and 1-2 E5LM Pumps-8AN Male Pump Outlet-6AN Male Return Inlet-Fuel Starvation Protection-High Current Electrical Hardware-Compatible with Various Pumps-Anodized Aluminum Construction INCLUDED-8AN Male Fitting for Pump Outlet-6AN Male Fitting for Aftermarket Return-8.5mm Barb Hose End for OEM Return-6.5mm Barb Fitting for OEM Vent-OEM Fuel Sensor Mount-Venturi Siphon Jet Pump-Fuel Resistant Submersible Tubing-Fuel Resistant ETFE Insulated Wiring-Stainless Hardware-Pump Inlet Filtration 20-1512 FUEL HANGER, MK4, PUMPS NOT INCLUDED, WALBRO F90000267/274/285This fuel pump hanger is designed specifically for the following Walbro DCSS 39/50 fuel pump part numbers: F90000267, F90000274, F90000285.  Instruction PDF