25-182 - CM 3.4" BILLET SPIN-ON FILTER 20MM THREAD 2 5/8 O-RING (25-182) NEW! This 3.4" tall BILLET spin-on filter has 20mm thread and a standard o-ring. It accepts CM’s 2-1/4" high synthetic fiber depth filter element which flows 12 GPM of hot engine oil with no loss of pressure. It has a 3" dia. heavy-duty light weight billet aluminum housing with heat sink ribs and a raw aluminum finish. Our Price: $120.00