Universal Oil Cooler/Filter Adapter, 18mm-1.5 thread and 2-5/8 O-ring Fits: Chevy, LT1 and G.M. 4 and 6 cyl. applications Mounts in spin-on oil filter pocket, between the oil filter and the engine block to eliminate the need for a remote filter Machined out of Billet Aluminium with a black anodized finish for durability and long-lasting looks Eliminates the need for an oil-bypass eliminator, so unfiltered oil does not go back into the engine Includes mounting hardware and O-rings