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Discrepancies of fuel pressure in the fuel rail and the intake manifold have a direct effect on the vehicles' fuel injector. As the leader in the diesel industry, FASS has created a product that will maintain a constant fuel pressure on the vehicle. FASS Fuel Pressure Regulator was designed to provide diesel truck applications consistent fuel flow therefore giving the injector optimum operation and maximum performance to the engine. FASS Fuel Pressure Regulator (FASS-FPR-1001) is made from 6061 T-6 aircraft quality aluminum and is backed by a 4 year warranty. We are offering this high quality product from FASS at a very low price. Buying a FASS Fuel Pressure Regulator is a good investment; not only does it give the engine the strength boost it deserves, but it also prolongs the life of any diesel engine by maintaining the fuel pressure of the fuel injector.