MBPR 4″ PLM Downpipe-Back Exhaust GM Duramax 2001-2004 6.6L | Exhaust GM Duramax


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Product Description:

The MBPR 4″ Downpipe-Back Exhaust System (S6004PLM) for your 2001-2007 6.6L GM Duramax will produce a sweet engine sound.  This MBPR exhaust system is built from heavy-duty aluminized steel.  The PLM Series exhaust systems offer a value price without compromising on the quality built into every component. While the seams are a major point of rust through with some budget systems our fully sealed tubing adds years to your system. Constructed to the same specifications as our top of the line Pro Series we back this line with a 1 Year Warranty.


With your MBRP performance exhaust, you can make that happen with up to18 HP more horsepower and 28 ft/lb more torque. Give your truck more pulling power and a much improved throttle response.  The secret to getting more out of your diesel engine is to give it lots of cool, clean air. The only way that you can get fresh air in is to get the hot air out. From the spiral louvered high flow muffler to the fully mandrel bent tubing to minimal bend degree angles, your MBRP performance system gets exhausted out fast. Drop exhaust gas temperature by up to 200°F and set the stage for all the performance you want. An MBRP performance exhaust system is the starting point to getting the most from cold air intakes, programmers, modules, and downloaders.



  • 2001-2004 GM 6.6L Duramax LB7



  • 4″ Aluminized Steel Construction
  • Easy Installation
  • Improved Throttle Response
  • Increases 18HP & 28ft/lb Torque
  • 1 Year Warranty

Additional information

Weight 33.1 lbs


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