Aluminum Thermostatic Sandwich Oil Filter Adapter w/Plate & Fitting Increases Engine Oil Capacity Available; thus, Enhances Oil Lubrication and Protection of Engines 10AN Fittings to Allow Installation of External Oil Cooler / Additional 8AN Ports Built in Thermostat opens at 180 Degrees to Warm up Engine Properly M20 x 1.5, 3/4" - 16, 13/16" - 16 ,M18 x 1.5 Adapter Fittings Included Uses 3/4"-16 UNF Thread Filter