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MBRP Stainless Steel 4" Single Exhaust System (Cat.-Back)

Our Price: From $397.25 to $561.36
Manufacturer: MBRP Inc,

Application: 04.5-07 Dodge 5.9L Cummins

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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.   

Buy Now and receive a MBRP T5051 mirror polished stainless steel angled cut exhaust tip(s) FREE!

Free MBRP Exhaust Tip


  • Lower Exhaust Gas Temperature
  • 4" Mandrel bent tubing for maximum flow
  • Easy Bolt-on Kits, "Everything you need"
  • Utilizes OEM Hangers
  • Direct Fit design
  • Increased Horsepower

The new Cummins is screaming to make power!  Getting the engine to breath with a high flow exhaust system is the ticket you need to make this happen.

The new Cummins "600" is another improvement from Dodge that we have made just a little bit better.  Dodge has recognized the value of a 4" downpipe.  The new "600" comes with Factory 4" downpipe and catalytic converter.  For this reason, we have designed our new systems to allow you to keep the stock converter in place for a legal exhaust system.  Our 4" catback systems give you the benefit of high flow performance, a cooler running temperature and give the truck a sound that tells everyone you have the new Cummins "600".

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Additional Information

Download Instructions/Line drawing PDF

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Product Reviews

(9 Ratings, 6 Reviews) Average Rating:
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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!!!!!
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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!!
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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!!!
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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!!!!
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gooch (Unknown) 10/4/2006 8:50 AM
the exhaust bolted up very easily and looks amazing. thanks for another great purchase xtreme!