Car AN8-1/4NPS AN6-1/4NPS Transmission Oil Cooler Adapter Fittings fit for GM 4L80E 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007. Transmission Oil Cooler fittings Good corrosion resistance, high toughness, and no deformation after machining,Stable characteristics, high reliability. Each component is precision-machined to exact tolerances for trouble-freeperformance. Water-cooled oil coolers are placed in the cooling water circuit, using the cooling water temperature to control the lubricant temperature. Water-cooled oil coolers typically consist of an aluminum alloy casing, front and rear covers, and copper core tubes, with cooling fins on the outside of the tubes to enhance the cooling effect., Manufacturer: GAYCLG