FILTER ADAPTER PORTS UP, dune buggy vw baja bug For Volkswagen and VW based Dune Buggies Mounts a standard Spin-On Oil Filter in the location of your choice Adapters have 3/8" NPT female threads and supplied with 3/4 x 16 Nipple Use P/N: 9240, 9250, 17-2920, 17-2921, or 17-2922 Spin-On Filter