Enhance the performance of your 1989-1993 5.9 Cummins with the Fass TSD02165G Titanium Signature Series 165GPH Fuel System. This fuel system delivers 165GPH and features Whisper Technology for a smoother idle. It also has a 3 micron filtration rating, ensuring that your fuel is Always clean and free of contaminants. With an optional electric heater and fuel pressure gauge port, the Fass TSD02165G titanium signature series fuel system protects and extends the life of your fuel system and injectors.