Aftermarket Exhausts Systems are one of the most popular upgrades for any 1989-1993 Dodge 5.9L Diesel. When you start shopping for an exhaust you will notice multiple construction options and price ranges. Many manufacturers offer exhaust systems constructed in either aluminized steel or stainless steel. Adding an exhaust is typically a DIY installation and can be done right in your driveway with basic hand tools. An aftermarket exhaust will typically add horsepower/torque, lower the exhaust gas temperatures (EGT's), and can also improve engine efficiency. Exhaust systems can be offered in either 4" or 5" diameters, depending on your needs and preference. You can find exhaust systems from all of the leading brands like MBRP, Magnaflow, AFE, Banks Power, AP Emission Technologies, and more!