The Mack Replacement Pipe is a practical and reliable solution for replacing the 4ME-32603 OEM part. With a 4" diameter and aluminized construction, this R Model Intermediate Pipe fits most R Mack makes and models. Its durable design ensures long-lasting performance, making it a cost-effective choice for any Mack truck owner. Sold individually, this replacement pipe offers a seamless fit and easy installation. Trust in its quality and compatibility to keep your Mack truck running smoothly.