Dorman's Diesel High-Pressure Oil Pump (HPOP) Seal Kit includes all required components to seal the HPOP to the front housing of the diesel engine, as well as re-seal fittings to the sides of the pump. This direct replacement repair kit helps to prevent oil leaks and significantly cuts repair costs. Our HPOP Seal Kits are available separately, avoiding the expense and hassle of purchasing an entirely new high-pressure oil pump assembly. All Dorman products are engineered in the United States and backed by 100 years of automotive aftermarket experience. Our solutions are thoroughly tested and inspected, and if you experience any difficulty installing or using our parts, we have a dedicated technical support team of ASE Blue Seal certified professionals ready to help. To learn more about our quality and innovation, visit DormanProducts.com.