The Navistar Replacement Pipe is a practical and reliable solution for replacing the 1657118-CI pipe. Designed with a 5" 2 Degree OD pipe and made from aluminized material, this muffler inlet pipe fits most Navistar 9700 makes and models. With its compatibility with the OEM part number, it ensures a seamless replacement process. Trustworthy and efficient, this replacement pipe offers the benefits of durability and functionality, making it an ideal choice for any Navistar vehicle owner in need of a reliable solution.