This premium fuel inlet tube for the Cummins 5.9L and 6.7L engine is a critical component in the fuel supply system. It should be replaced any time the injector is serviced or replaced to reduce potential injector failure from contamination. The updated design of this part includes several features including a larger sealing surface to improve sealing between the fuel rail and fuel injector, an integrated edge filter and improved alignment pin. Product Features:Updated and improved design to reduce potential leakage between injector and fuel inlet tubeIncludes integrated edge filter to reduce potential injector failure due to contaminationUpdated alignment pin designPrecision machined using premium materialsIncludes O-ringIncludes technical bulletin and installation tipsRecommend replacement any time injector is serviced or replaced