This is a universal replacement muffler from Walker, a trusted brand in exhaust parts. It's made from 100% aluminized steel, which resists corrosion much better than plain steel, so it should last longer. The inlet and outlet are both 2.25 inches in inner diameter (ID). It's designed to provide a factory-style sound (not super loud) using louvered tubes to reduce noise. It has internal features to handle heat expansion and promote drainage. The key word is 'universal' – it's not a direct bolt-on for every vehicle. It will likely need to be cut to fit and welded into your existing exhaust system by a shop. The listing shows compatibility with many 1970s Dodge trucks (D100, D150, D200, etc.), but ALWAYS double-check measurements and your specific vehicle before buying. A solid, quality universal muffler for a custom exhaust repair or build.
