HKS replacement Filter Elements are available in a dry 3-layer, triple density or wet 2-layer, dual density construction. The dry 3-layer type is standard in HKS SPF Reloaded Intake kits, and is designed for superior filtration while still providing excellent airflow.  If your vehicle is in a high dust area, HKS recommends using dry 3-layer elements

Check you Diameter of the Filter Element before ordering - this is 150mm 2 Layer