FASS 1998.5-2004 Cummins 5.9L Titanium Signature Series - 100GPHFASS 1998. 5 2004 Cummins 5. 9L Titanium Signature Series 100GPH NOTE: If the truck has been retrofitted with an in tank System, you need to purchase a TSD07100G Kit. The Titanium Signature Series diesel fuel System was engineered by FASS Fuel Systems to be the top performing, longest lasting and most reliable aftermarket filtration System in the diesel industry. Rated at 100 gallons per hour and backed by a limited lifetime warranty this Titanium