The International ProStar 2010 Through 2012 Flex Bellows Kit is a reliable and durable solution for preventing exhaust leaks and maintaining engine efficiency. This kit includes a 4-inch inside diameter exhaust bellow, 2 clamps, and 2 gaskets, providing a complete installation. Engineered in North America with quality materials, this flex pipe is designed to match the fit and function of the original pipe. It has undergone rigorous testing to ensure proper fit and performance for International ProStar 2010-2012 vehicles with MaxxForce 13 engines. Trustworthy and practical, this kit is a direct OE replacement for Navistar 3859154C1.