Find multiple Exhaust Adapters for the custom exhaust on your 2003-2004 Dodge 5.9L Diesel. Y-pipes and exhaust reducers typically start at 3.5" and go all the way to 7" in diameter so that they can be used in a wide variety of applications. You'll find stainless-steel and aluminized adapters to suit your needs and match your existing exhaust application. Find high-quality products and components from MBRP, Magnaflow, and Silverline.