The Mack 25.59 Inch Long And 5.04 Inch Diameter Replacement Exhaust Pipe is a practical and reliable solution for replacing OE parts 21278885 and 23630044. Made in the USA with stainless steel construction, this exhaust pipe is built to last. With a length of 25.59 inches and a diameter of 5.04 inches, it fits most Mack makes and models. The exhaust emission norm is EPA 10, ensuring compliance with regulations. Each purchase includes clamps and gaskets, making installation hassle-free. Trust this directly replaceable exhaust pipe for its quality, durability, and compatibility with your Mack vehicle.