For people thinking about upgrading the appearance of their engine, one change worth looking into is a new billet oil cap. In a matte black finish, the AFE Billet Oil Cap is a simple way to vastly improve the look of the engine. In addition to the visual appeal, this aluminum cap is equipped with an o-ring style gasket that guarantees a seal free of leakage. For issues relating more to performance, the Fluidampr Performance Diesel Series Damper should be highly considered. It lowers the noise level of diesel engines considerably to create a smoother experience and better horsepower and torque. Constructed from the top aircraft-grade aluminum with a 100% brazed aluminum core, the Mishimoto Aluminum Primary Radiator is a significant upgrade to the factory cooling system that frequently causes problems. Much smaller than the factory radiator, this is an engine part that will create extra space while operating much more efficiently.