MBRP 4" XP Series Turbo-Back Exhaust System S6126409

2004.5-2007 Dodge 5.9L Cummins (All Cabs & Beds) (Off-Road)
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MBRP Performance Exhaust
XDP Part Number:
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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

MBRP's XP Series is the performance exhaust of choice for the enthusiast who needs a system that can take anything that the road throws at it. This system's rugged sixteen gauge T409 construction can be counted on to withstand everything from salt to rocks, tar to grime. We have had such success with this line that we back it with a Lifetime 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" T409 Stainless Steel 
  • Turbo-Back Exhaust System
  • Lifetime Warranty
  • "Off-Road" Removes Factory Cat. Converter
  • Rich, Mellow Exhaust Note
  • Installs With Common Hand Tools
  • Mirror Polished, T304 Stainless Steel Exhaust Tip

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


Mfg. Number:

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

(37 Ratings, 6 Reviews) Average Rating:
XP Exhaust
Brian (Cle Elum, Wa) 12/6/2015 9:47 PM
Well forget about unbolting the old exhaust. Save yourself some time and cut it out. Installing the XP took less time that cutting the old one out. Fits like a glove. Sounds great to. Thanks to the guys at XDP for recommending it to me.
Excellent Exhaust System
William H. (Fairfax, VA) 10/26/2013 12:34 PM
The XP 4" system went on really easy. No complications with the install at all. I did upgrade to band straps for all the connections instead of using the U-bolt clamps which made for a super clean install and finished look. The sound is nice and mellow and there were no leaks at any of the connection points. The stock system went 100,000 miles before rusting out at several locations and blowing out the muffler seam from front to back. This system should last the life of the truck since it's all stainless. GREAT JOB MBRP!!!!!
Mike G. (Ohio.) 4/24/2012 7:09 PM
This is a great system for someone who wants to wake up their Cummins without making it sound too obnoxious. The drive thru people will still hear you when you order, but you will turn their heads when you leave. Took about 2 hrs to install with the help of a sawsall for removal of old system. Fit perfectly. The salesman from XDP was very helpfull in picking my system.
Nice exhaust system
Justin Brouelette (Billings, MT) 1/4/2012 10:13 AM
Fit and finish is very good, no problems with install, took longer to cut out the old exhaust. Great instructions for easy install. Has a nice mellow note without being overly loud, I can leave the truck running at the drive through. Free nice looking tip as well, with a good warrenty.
Love It !!
Greg (Indiana) 11/22/2011 11:39 AM
Excellent product all of the way around. Easy to install, looks good, and sounds even better. I gained 2.5-3 highway mpg. The people at XDP are great, ordered it on Monday got it on Wednesday.