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USD 664.99
Part #: MBS6004BLK

MBRP 4" Black Series Downpipe-Back Exhaust System S6004BLK

2001-2007 GM 6.6L Duramax (All Crew & Extended Cabs)
Part #: MBS6004BLK
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The Best Systems Start with the Best Materials
The MBRP 4" Black Series Downpipe-Back Exhaust System S6004BLK is built for your 2001-2007 GM 6.6L Duramax from heavy duty, black coated aluminized steel. The MBRP Black Series performance exhaust systems offer a true "murdered out" style without compromising on quality and performance. With fully sealed seams to resist rust you can count on this system to really hold up. The black coat finish is specifically formulated to withstand the extreme heat and abrasive conditions an exhaust system is exposed to. 

Built to Perform 
You count on your truck to tow all of your gear to where you want it. With your MBRP performance exhaust you can make that happen with up to 18 HP more and 28 lb-ft more torque. Give your truck more pulling power and much improved throttle response with an MBRP diesel exhaust system.  

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 MBRP performance system gets exhaust out fast. Drop exhaust gas temperature by up to 200 degrees 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. 

Easy Installation
MBRP systems are as much fun to install as to drive with on your truck. A bolt-on, no weld design makes installing this on your truck a no hassle 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 MBRP, appearance and sound is just as important. Every MBRP performance exhaust system has been specifically tuned to get the optimal sound from your pickup. With an MBRP brand etched on the tip and their unmistakable styling, there's no question that you will have the hottest exhaust on the road - MBRP.

  • 4" Black Coated, Aluminized Steel Construction
  • Downpipe-Back Exhaust System
  • 3 Year Component Warranty, 1 Year On Finish
  • Black Coated Exhaust Tip
Application Notes:
This exhaust system retains your factory catalytic converter. 
All Crew & Extended Cabs applies to GM 2500HD/3500HD Pickups. Not for use on Cab & Chassis. 
This system will fit on Regular Cab models but requires the use and purchase of the Regular Cab Adapter Pipe below. 
Vehicles originally equipped with a catalytic converter must retain the factory catalytic converter. Removal of the catalytic converter may be a violation of federal or local regulations.


  • MFG. Number S6004BLK
  • Manufacturer Name MBRP Inc.
  • Shipping Weight 76.00 lb.
  • Shipping Length 60 in.
  • Shipping Width 17 in.
  • Shipping Height 12 in.
  • Fuel Type Diesel
  • Diameter 4"
  • Exhaust Exit Single
  • Exhaust Type Downpipe-Back
  • Material Aluminized Steel
  • UPC 882963107886
  • Warranty Yes
  • Warranty Info 1 Year Finish / 3 Year
  • Prop 65 WARNING: Cancer & Reproductive Harm -


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Questions and Answers

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Most Popular Questions

Can I get the MBRP 4" Black downpipe back as a straight pipe without muffler?
View Staff Answer 

Unfortunately, the MBRP Black Series are only sold with the muffler. To eliminate the muffler you must purchase an MBRP muffler delete pipe separately.

Emissions Notice

This product is not legal for sale or street use in California. Certain aftermarket products are subject to governmental emission standards regulated by the California Air Resources Board. In order for these products to be legal on a specific vehicle in California, the part number must receive a CARB Executive Order (EO) number. This number makes the part legal for use only on specific years, makes and models of vehicles. A decal with CARB EO number for these parts must be displayed in the engine bay to satisfy smog inspection requirements.