For heavy duty filtration, AMSOIL provides two types of bypass oil filtration options. The first option is the single remote Heavy Duty Bypass System, this system features a single large filter (EABP120) used in conjunction with your traditional full flow filter. The second option is the DUAL-GARD Bypass System. This system looks very similar to a dual remote bypass system, however, both filters on the head are bypass filters, and the full flow filter remains in its traditional location. The DUAL-GARD Bypass System can use a combination of the traditional sized bypass filters. Whichever option you choose both options provide superior filtration for your engine.