MBRP 01-04 Chev/GMC 6.6L Duramax 3in Black Turbo Down PipeMBRP 01 04 Chev GMC 6. 6L Duramax 3in Black Turbo Down Pipe Replace that restrictive factory downpipe with a MBRP direct replacement downpipe for more flow, fuel economy, and better performance. Removal of OEM catalytic converters may be a violation of emissions laws in your jurisdiction. Ensure that the intended use of this product is permitted. Not for sale or use in the state of California. Armor Lite Turbocharger Down Pipe; 3 in. Diameter; Incl.