TRANSDAPT OIL FILTER BYPASS ADAPTER, ALUMINUM, NATURAL FINISH -- 20 mm x 1-1/2 thread size, 2-5/8 diameter o-ring, 2-1/2 in. filter flange inside diameter, 2-3/4 in. filter flange outside diameter, 1/2 in. NPT inlet and outlet size, spin-on bypass filter adapter style; Fittings, oil filter, hardware, and hoses not included; Allows you to incorporate a remote oil filter system or oil cooling system; Not for diesel, marine or race use; Fits engine blocks designed to accept oil filters with a 22 mm x 1-1/2 thread and a 2-5/8 in. O-ring; Not for diesel, marine or race use; Easy installation; With 1-year TransDapt limited warranty.