AP Exhaust Technologies® is a trustworthy manufacturer of high-grade exhaust and emission products. AP offers a large collection of replacement and performance products for automotive, light truck, heavy-duty as well as agricultural, industrial, and forestry applications. Since the companys earliest days in 1927, it has been improving and updating its products which resulted in numerous patented designs. For instance, its revolutionary design of the Single Cartridge Internal Muffler helps significantly boost engine performance.