Products Showing Parts for — {{ }}

No Results Showing Parts for — {{ }}
USD 509.99
Part #: MBS6122AL

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

2007.5-2009 Dodge 6.7L Cummins (All Cabs & Beds) 4WD
Part #: MBS6122AL
★★★★★ ★★★★★ 6 Reviews
Our Recommendations Compatible Products
Scroll to View More


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.


  • MFG. Number S6122AL
  • Manufacturer Name MBRP Inc.
  • Shipping Weight 64.00 lb.
  • Shipping Length 60 in.
  • Shipping Width 17 in.
  • Shipping Height 12 in.
  • Fuel Type Diesel
  • Diameter 4"
  • Exhaust Exit Dual
  • Exhaust Type Filter-Back
  • Material Aluminized Steel
  • UPC 882963103505
  • Warranty Yes
  • Warranty Info 3 Year
  • Prop 65 WARNING: Cancer & Reproductive Harm -


★★★★★ ★★★★★
2.0/5 Stars out of 6 Reviews
(Unknown) | December 21st, 2007
the sound and looks are great but the install is a pain and it still does not fit right .. i have to keep moving the pipes because they all ways start to rub and know have rubbed a hole in the driver shock.. not to happy
(ga.) | September 5th, 2008
purchased bmrp cool duals 08 dodge 2500exaust 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!!!
(south dakota) | September 17th, 2008
it looks great in the box but the is not enough room between the pipes and the gooseneck frame and it rattles at idle!!!!!!
Pages 1   2

Write a Review

Include Your Order Number For a Chance to Win a $100 Gift card

Overall Rating

Your Information

Email Address will not be made public.

Customer Photos

Customer Photos

See what others built Submit your photo

Questions and Answers

Ask XDP a Question about this product (Allow 24-48 hours for reply)

Most Popular Questions

Does this system work on 2008 dodge 6.7l mega cab dually?
View Staff Answer 

The MBRP 4" Dual Installer Series Filter-Back Exhaust System S6122AL fits all 7.5-09 Dodge 6.7L Cummins 2500/3500 Quad Cab / Mega Cab (4x4 ONLY) trucks.

Click Here to view the Install Sheet