Walker 42531 Walker Heavy Duty Aluminized Stack Pipe. INLET INSIDE DIAMETER 4", OUTLET INSIDE DIAMETER 4", LENGTH 24", PIPE WALL THICKNESS 0.060". OUTLET TYPE: PIPE CONNECTION

Walker premium replacement pipe features 100% aluminized steel construction for durability and is manufactured with precision benders, and then fixture checked insuring a precise fit for quick and easy installation. Walker is a "one-stop" convenience, offering complete engine-to-tailpipe coverage of replacement emissions control systems and components for popular domestic, import and commercial vehicle applications.