MBRP 4" XP Series Cat-Back Exhaust System S6108409

2004.5-2007 Dodge 5.9L Cummins (All Cabs & Beds)
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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 Construction
  • Cat-Back Exhaust System
  • Lifetime Warranty
  • Rich, Mellow Exhaust Note
  • Installs With Common Hand Tools
  • Mirror Polished, T304 Stainless Steel Exhaust Tips

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

(11 Ratings, 7 Reviews) Average Rating:
JW (Punta Gorda, Fl) 12/4/2011 6:26 PM
MBRP is what I was looking for. Quality in stainless steel, straight forward install and the sound is perfect. Thanks XDP for another great product for my 06 Dodge 2500. Five stars for the exhaust and XDP!
06' Mega cab
Dave (Rockford, Michigan) 3/10/2010 1:56 PM
Just installed this past weekend and all I can say is I made the right decision. Just in the short time, mileage improvement up 3mpg, the 4" size is just perfect. Everything bolted right up where stock was, it took more time to remove the old stock then to install new. Sounds very nice in the cab and when you go to the back of the truck, it sounds better yet with a deep mellow rumble. Awesome Exhaust!!!!!
t 409 stainless cat back system
Philip (kansas) 2/24/2010 9:07 PM
This system was very easy to install great looks and wonderful sound with this kit. Interior noise is minimal but you sure know that its back there. power increase and mileage increase noticed. Would buy again!!
04 Ram
Raymond Coblentz (Guys Mills, PA) 2/19/2009 9:28 PM
Removed old rusted out system and installed Stainless in around an hour,I,m not a machanic and this was with a sore thumb. Starting from front works best. GREAT SYSTEM!!!
Mega Cab upgrade
bluzkluz (Unknown) 10/25/2006 1:23 PM
I installed the MBRP stainless cat back on my 06 Dodge Mega Cab 4x4 3/4 ton diesel...what a riot! The quality, fit and finish along with the awesome tone and performance are a no brainer for the price. The weight savings alone was amazing. Along with an Airaid intake I am getting 22 mpg on the freeway with this beast and 17 mpg around town with my foot in it all day long. I am very impressed and the quality and easy of install exceeded my expectations. Great product!!!!