Facilitates smooth oil transfer between engine and cooler. 1999-2005 Chevrolet Silverado 2500 | Position: Inlet and Outlet Assembly | Note: Rubber;7.75 mm Length Flared End Tube. 2001-2003 Chevrolet Silverado 1500 HD | Position: Inlet and Outlet Assembly | Note: Rubber;7.75 mm Length Flared End Tube.
Lines were a perfect OEM fit. No more leaks. Good quality, and a great value. Was not a easy installation. Had to remove clip to remove, and install lines.