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USD 489.99
Part #: MBS6020AL

MBRP 5" Installer Series Downpipe-Back Exhaust System S6020AL

2001-2007 GM 6.6L Duramax (All Crew & Ext. Cabs)
Part #: MBS6020AL
★★★★★ ★★★★★ 8 Reviews
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XDP - MBRP Authorized Online Retailer XDP is a MBRP Factory Authorized Online Retailer ID# 600207727. We would like you to shop with confidence knowing your purchase is covered by the manufactures warranty.   

The Best Systems Start with the Best Materials

Built from heavy duty aluminized steel our Installer 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 3 Year Warranty.

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 to18 HP more horsepower and 28 ft/lb more torque. Give your truck more pulling power and much improved throttle response with an MBRP 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 MBRP performance system gets exhaust out fast. Drop exhaust gas temperature by up to 200F 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. 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 MBRP we believe that 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 our MBRP brand etched on the tip and our unmistakable styling, there's no question that you have the hottest exhaust on the road - MBRP.


  • 5" Aluminized Steel
  • Downpipe-Back Exhaust System
  • "Off-Road" - Removes Cat. Converter
  • 3 Year Warranty
  • Installs With Common Hand Tools
  • Tip Not Included

Note: Aftermarket tuning required when removing cat. converter on 04.5 & up models to avoid EGR trouble codes.


  • MFG. Number S6020AL
  • Manufacturer Name MBRP Inc.
  • Shipping Weight 91.00 lb.
  • Shipping Length 60 in.
  • Shipping Width 20 in.
  • Shipping Height 14 in.
  • Warranty Yes
  • Warranty Info 3 Year
  • Prop 65 WARNING: Cancer & Reproductive Harm -


★★★★★ ★★★★★
4.5/5 Stars out of 8 Reviews
Toms Duramax
(Unknown) | March 10th, 2007
this kit is great it fits really good really loud and deep
Silver Bullet
(Iowa) | November 27th, 2008
This kit was went together with extreme ease. Pipe fit excellent, no cutting required except for the end of the tailpipe where the tip fit together at. The sound is really deep and loud with or without the straight pipe, but I prefer the straight pipe. The only thing I have to say is the 6 inch tip could be spread apart more before shipment, had a hell of a time putting it on.
(Moreno Valley, California) | March 4th, 2009
not only does this thing look and sound SICK on my truck but it was a piece of cake to install. did it myself in about an hour and a half. the package arrived exactly when it said it would. have nothing but good things to say bout XDP! thank u!
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Questions and Answers

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Most Popular Questions

Do i have to have the aftermarket tuning after i install this on my 03 Chevy 2500 LB7?
View Staff Answer 
Aftermarket tuning is only required when removing cat. converter on 04.5 & up models to avoid EGR trouble codes.
What's the advantage / disadvantage of running a single exhaust vs a dual exhaust systems offered in this series?
View Staff Answer 

The performance gains are the same for duals and single systems. The duals offer a deeper more aggressive sound over the single system. This is due to the extra tail pipe and the fact that most dual systems have a slightly different muffler configuration than the single systems.

All of MBRP’s diesel exhaust systems will fit with factory installed trailer hitches as well as most aftermarket bolt on hitches. You may run into interference problems if you have a fifth wheel or gooseneck hitch installed and you plan on running a dual exhaust system. In that case we recommend installing a single system.

Does this fit the chevy express van?
View Staff Answer 

No, the MBRP 5" Installer Series Downpipe-Back Exhaust System S6020AL will only fit the pickup applications.

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.