At the heart of Bulletproof Diesel's 6.0L oil system upgrade is a trick billet aluminum transfer block. The unit completely replaces the factory cast aluminum oil filter housing. In doing so, engine oil is redirected to the front of the vehicle where a large aluminum cooler and filter assembly further improve upon the factory design. This block is manufactured on a CNC mill to specific design tolerances established by the engineers at Bulletproof Diesel. To the best of our knowledge, nobody else offers a unit of this kind. We like the fact that the transfer block utilizes the OE gaskets and hardware to retain the assembly to the engine. Once the cab of the vehicle is free from the chassis, the installation of the transfer block is a simple bolt-on affair.