Best Exhausts For 6.7L Cummins (2007.5-2018) – 2021 Review

| Last Updated: December 24, 2021

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Everyone likes to focus on the aesthetic components of exhaust systems, but you should also know that an exhaust system is a crucial component of your engine’s functionality. The best exhaust systems have aesthetic appeal and are able to make your truck run more efficiently at multiple levels.

Read on to see our list of the best systems for your 6.7L Cummins engine.

Comparison of the Best 6.7L Cummins Exhausts

  • Comes with a six inch polished tip
  • 409 Steel Construction for enhanced rust protection
  • Trusted MBRP Quality
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  • Excellent for budget-minded builds
  • Mirror polished 5" Tip Included
  • Quick, simple installation
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  • Boosts turbo noise and the throttle response
  • Works well when installed with engine tuners
  • Easy to check the filter for maintenance purposes
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  • Improves the functionality of the exhaust brake
  • Makes it so turbo sound can be heard more easily
  • Has thorough, detailed instructions for simple installation
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How to Choose a New Exhaust For Your 6.7L Cummins

There are a number of features you should take into account when weighing your exhaust options:

Ease of Installation

Exhaust systems are not exactly the most straightforward installation process you could undergo for your car. You will need to actually get physically beneath your car to get this kind of system installed, so any streamlining of the installation process will be something you greatly appreciate.


This is really an individual consideration. For some people, it is important to have a loud exhaust system that will rev at a really high level. For others, they want a system that will improve aspects of their truck’s functioning, but will not draw any additional attention to them. You will have to figure out what you want in terms of exhaust noise and choose a product that best fits your needs.


Exhaust systems go through a lot! They deal with an excess of hot air and are definitely the dirtiest parts of your vehicle. You want to make sure you invest in an exhaust system that will be able to go the distance and will not require frequent repairs.

Review of the Best 6.7L Cummins Exhausts

Since you now know a bit more about what to look for in an exhaust system, let’s check out some systems themselves:

Best Overall 6.7L Cummins Exhaust:
 MBRP 5" Filter-Back XP Series, Single Side Exit

MBRP 5" Filter-Back XP Series, Single Side Exit


  • Customizable
  • Made of 409 Stainless Steel
  • Comes with hangers attached
  • Well made of high quality material


  • Exhaust system takes up enough space to infringe on truck’s ground clearance

The MBRP Performance 5” DPF Back Single Outlet Exhaust System is a fantastic exhaust system that will be just straight up fun for you to use on your truck. This system fits all bed and cab configurations, so no need to stress about it potentially not matching up with any 6.7 Cummins model from 2013 – 2018.

And if you are the type of person who likes to rev your truck, but you are not interested in premature deafness, never fear – this system strikes a great balance between providing an awesome rev sound and not totally destroying the driver’s hearing. Installation with this system is nice and straightforward, thanks to the included bolt on hangers. And best of all, this exhaust system will boost your vehicle’s horsepower, torque, and fuel efficiency.

Bottom Line

The MBRP Peformance 5” DPF Back Single Outlet Exhaust System is a great exhaust system that will boost the overall effectiveness of your truck. It may make it so that your truck has lower ground clearance, though.

 MBRP 4" Filter-Back AL Series, Single Side Exit


  • Well designed
  • Installation is easy
  • High quality construction
  • Aesthetically pleasing, with a flashy tip


  • Only part of the pipe that is chrome is the tip
  • Does not fit short bed trucks, will need to be cut

The MBRP 4” DPF Back Single Outlet Exhaust System is an awesome exhaust system that will make your truck the best looking truck on the whole road, without a lot of investment of time and energy on your part. The installation process for this exhaust system is straightforward and simple enough to do on your driveway, without any special tools needed.

The pipe is well designed and the construction is high quality. The coolest thing about it is the chrome tip on the tailpipe itself, which will certainly help your truck stand out from the crowd. There is a lot to appreciate with the MBRP 4” DPF Back Single Outlet Exhaust System.

Bottom Line

The MBRP 4” DPF Back Single Outlet Exhaust System is a great exhaust system that is sure to impress your fellow truck drivers without too much additional stress and a complicated installation process. If you have a truck with a shorter bed, though, be prepared to cut this system to fit.

Honorable Mention:
Diamond Eye 5" DPF (Diesel Particulate Filter) Back Stainless Steel Exhaust System


  • Easy to install
  • Boosts engine fuel economy
  • Comes with simple installation instructions
  • Diamond Eye provides good customer service
  • Will increase horsepower, throttle response, and torque


  • Components will ship separately, so there may be a waiting period before it all arrives

The Diamond Eye 5” DPF (Diesel Particulate Filter) Back Stainless Steel Exhaust System is a phenomenal exhaust system that will actually fit your truck better than the factory exhaust system does (it will allow for greater ground clearance!). Because of the simplicity of this exhaust system’s components, it is also quite easy to put together – users report that installation should take no more than an hour at most.

Additionally, the system ships with all of its required tubing and parts, so you will not need to made any added purchases. The mandrel bent tubing this system utilizes will boost your engine’s exhaust flow to its absolute maximum, meaning all other aspects of your truck’s engine will run more efficiently, and its full capability for power and fuel economy will be 100% maximized.

Bottom Line

The Diamond Eye 5” DPF (Diesel Particulate Filter) Back Stainless Steel Exhaust System is a great exhaust system that is straightforward and easy to install and operate. You may need to wait a bit for all of the separate parts to come, though.

4. Magnaflow 5" DPF (Diesel Particulate Filter) Back Single Outlet Black Series Exhaust System


  • Durable
  • Made of stainless steel
  • Fits all different cab and bed configurations
  • Will boost miles per gallon by two to three miles


  • Can be complicated to install
  • Magnaflow does not provide good customer service

The Magnaflow 5” DPF (Diesel Particulate Filter) Back Single Outlet Black Series Exhaust System is one of the best looking exhaust systems you will be able to find on the market today! If you are looking for a truly unique exhaust system, you have got to go with this Magnaflow option. The black finish and the six inch polished tip really set it apart from other models.

Additionally, users report that this exhaust system does a great job at striking a balance between still producing an awesome revving sound and not being so loud it will hurt your ears or draw undue attention to your car when you are driving. It will also produce gains in both horsepower and torque for your vehicle, which is always good news.

Bottom Line

The Magnaflow 5” DPF (Diesel Particulate Filter) Back Single Outlet Black Series Exhaust System is a great exhaust system that is aesthetically unique and badass. Just know that it is a bit more complicated to install than some of the other systems on this list.

Perks of Upgrading Your Exhaust

There are definitely some great reasons for investing in an exhaust system that goes above and beyond your stock option. Here are a few of the biggest:

Maximizing Efficiency

Exhausts are not just about sound or looks – they actually do make your engine run better. A good exhaust system ensures that particulate matter does not gum up your engine, which can cause long term impacts. Go with a system that will empower your truck to be its very best.


Quality exhaust systems can adapt to whatever cab/bed configuration the truck you are working with has. This also means that hypothetically, when you are ready to move on to a new car, you could potentially take the exhaust system with you as well.


This is definitely one of the more frivolous considerations to make, but come on – you are not going to upgrade your truck’s stock exhaust to a system that does not even look cooler, are you? Of course you want an exhaust system that looks impressive, however you may define that term, whether that means a chrome or matte system, a large or smaller tip, etc.


You have just got to value your truck’s exhaust system, both for what it can do for your truck’s engine, and of course, how cool it looks. There are a lot of reasons for upgrading from your factory stock system to one of our recommended models. Think long and hard about what would be best for your truck, and trust that, if you choose a system from our list, you definitely will not be able to go wrong. 

Sean comes from the forums actually and drives an OBS Ford. He writes fantastic DIYs and knows his way around a camera, too. We keep him caffeinated and away from DPF filters to avoid another rant about recent emissions restrictions.