The Freightliner Replacement Pipe is a practical and reliable solution for replacing the Freightliner Part # 04-12399-000. With its 5" 2-Bend OD/OD Pipe and Aluminized construction, this pipe fits most Classic Freightliner Makes and Models. Designed to be durable and long-lasting, this replacement pipe offers the perfect fit and functionality. Whether you need to replace a worn-out pipe or upgrade your Freightliner, this product is a reliable choice.