Keep the emission system on your 2006-2007 Chevy/GMC 6.6L LLY/LBZ Duramax functioning properly with a high-quality replacement Catalytic Converter. Universal Catalytic Converters typically install with welding or cutting to the current exhaust system as they are designed to work for multiple applications. Direct-fit Catalytic Converters allow for a hassle-free installation as they are designed to mount in the factory location without the need for cutting or welding. XDP has the replacement Catalytic Converter your vehicle needs from leading brands like Magnaflow.