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01-07 Chevy 6.6L Duramax Downpipe-back MBRP No Muffler Exhaust System


This item was replaced with a new system and the year range fitment changed. Click here to view the S6005PLM exhaust.

MBRP Performance Series 4 Inch Turbo Back Off Road Aluminized Exhaust system without muffler for the 01-07 Chevy 6.6L Duramax Diesels.

For off-road use, this system deletes the catalytic converter. Fits extended can & crew cab configurations, long or short box. Regular cab trucks may require custom modifications to fit. 

MBRP Muffler Delete Exhaust System

4" Aluminized Steel Construction Mandrel bent tubing for maximum flow.
Bolt on hangers
Complete with all necessary hardware for installation
2 Year warranty
Does not include tip*


  • Delivers a rich, mellow exhaust note
  • Installs with common hand tools
  • Can improve fuel economy by 1-2 mpg
  • Boosts torque and horsepower
  • No muffler included

    * Not designed to fit Duramax LMM

    The Best Systems Start With the Best Materials

    Built from heavy duty aluminized steel our Performance Series performance 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 an industry leading 2 Year Warranty.

    Built to Perform

    You count on your truck to tow all of your gear to where you want it. With your MBRPinc performance exhaust you can make that happen with up to 18 HP more horsepower and 28 ft/lb more torque. Give your truck more pulling power and much improved throttle response with an MBRPinc diesel exhaust system. Our systems are so much more efficient, it will be easy to see what your truck can really do.

    Minimize Backpressure

    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 MBRPinc performance system gets exhaust out fast. Drop exhaust gas temperature by up to 200ºF and set the stage for all the performance you want. An MBRPinc performance exhaust system is the starting point to getting the most from cold air intakes, programmers, modules and downloaders."

    Easy Installation

    MBRPinc systems are as much fun to install as to drive with on your truck. Bolt-on, no weld design makes installing this on your truck a no hassle one and a half to two hour project. Everything is direct fit to the OEM hangers and you get all the clamps and parts you will need, all in one box, no matter what configuration of truck you have."

    Sound & Style

    Performance is one thing but at MBRPinc we believe that appearance and sound is just as important. Every MBRPinc performance exhaust system has been specifically tuned to get the optimal sound from your pickup.

    MBRP: S6004PLM

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