1999-2007 2wd 4wd, 2500HD, non -dually 10.5/11.5Inch 14 Bolt, Rear Axle Brake Lines, Stainless 2pc These are for and non-dually vehicles, specifically the brake lines that run from the rear rubber drop-down hose across the rear axle to the calipers. They are both the right and left sides, preformed with the wrap and the fittings on the ends, ready to bolt into place. These are a direct replacement. Made in the USA by Inline Tube in Detroit, Michigan, USA.