Get the Exhaust Adapters that will make customizing your 1989-1993 Dodge 5.9L Diesel's exhaust a breeze. The adapters are available in stainless and aluminized steel to ensure they match the proper application and climate. 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. Magnaflow, MBRP, and Silverline are just some of the top tier brands you'll find when searching for exhaust components.