MBRP 4" Dual Installer Series Filter-Back Exhaust System S6122AL

2007.5-2009 Dodge 6.7L Cummins (All Cabs & Beds) 4WD
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MBRP Performance Exhaust
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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 200ºF 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.


  • 4" Aluminized Steel Construction
  • Filter-Back Dual Exhaust System
  • 3 Year Warranty 
  • Rich, Mellow Exhaust Note
  • Installs With Common Hand Tools
  • Mirror Polished, T304 Stainless Steel Exhaust Tip

Dual Exhaust Systems are not recommended for use on trucks with in-bed hitch.

Application Note: All Cabs & Beds applies to Dodge Ram 2500/3500 Pickups. This system is not designed for use on Cab & Chassis models.

Buy Now and receive a MBRP mirror polished stainless steel angled cut exhaust tip(s) FREE!

Free MBRP Exhaust Tip

Additional Information

Install Sheet

Mfg. Number:

Customer Reviews - Include your order number for a chance to win a $100 GiftCard

(21 Ratings, 6 Reviews) Average Rating:
real cool duals
gary mcc (yardley pa) 9/23/2009 3:58 AM
i found them to be a good fit and easy to install,they are a nice set of duals at a reasonable price.i have an 08 dodge dualy with a fifth wheel hitch and they fit great.thanks mbrp
waste of time
jay (hilo,hawaii) 5/1/2009 2:30 AM
bought the the duals for 6.7 dodge. very dissapointed with results. it sounds ok but clamps dont work well, driver side rear rubs against shock and rattles. what a waste of time and not to mention money. my friend owns the same truck only he went the the banks system. now thats an exhaust. oh and the another thing MBRP better get your act together
Carlo (Seatttle) 1/26/2009 11:52 PM
First off - I DO NOT RECOMMEND THIS PRODUCT. I had my local Dodge dealer install this system on my BRAND NEW 3500, by recommendation of the parts guy ... should've done my research. The sound is so, so ... the left pipe rubs against the left rear shock housing and the "stainless steel" used for the tips is about as stainless as a 4 year-olds white t-shirt at a summer barbeque! I may get the tips powder-coated black or just swap 'em for a different pair. At this point, too much of a headache to go through the hassles of returning but in a year or so - I'm going to swap the whole system. This time however ... I'm doing my research.
brian sw (south dakota) 9/16/2008 11:25 PM
it looks great in the box but the is not enough room between the pipes and the gooseneck frame and it rattles at idle!!!!!!
whitehead (ga.) 9/4/2008 11:57 PM
purchased bmrp cool duals 08 dodge 2500 exaust clamps does not hold securely,hangers to weak,welded pipes to hold securely in place,right side pipe longer than left,tips does not work out evenly,left tailpipe under load was no clearance between pipe and driverside shock,rubbing together,called bmrp about problem,since pipes were welded,they say system was altered,they "would not correct the problem" have bought three systems from them,pissed off, no more of my business nor recommend to anyone to purchase a bmrp product!!!