Do it Yourself Cummins Diesel Performance Blog

DIY Cummins Performance 6.7L

6.7l Cummins Turbo Diesel
6.7l Cummins Turbo Diesel

DIY Cummins 6.7L Cummins Performance

Hey, all you proud diesel enthusiests out there. I know a lot of you own trucks with the new Cummins 6.7L engine. I also know that there has been some emissions issues with these trucks. I personally have worked on many under warranty and customer pay that have these issues, anywhere from egr problems soot build up in egr and turbo, to having the whole dpf system replaced due to plugged soot accumulators. So many of you want to get rid of this system and want to and monster power to your 6.7L. You probably have heard a lot of hype about this subject its very touchy because of warranties being voided, but I am gonna set you straight and tell you some performance tips and addons that will make your 6.7L a beast. This engine was built to work it is strong and reliable but I want to help you squeeze out all the power and torque you can.

To start we will cover the intake, emmission system and dpf performance. Ok want you want to start with your intake so you can let your engine breath better. The air intake system is one of the most common and least expensive performance modifications. I personally recommend the S&B Filters Cold Air Intake Kit. Flows 37.7% Better than the Stock Intake and 99.24% Efficient @ 642 CFM. The filter protects your engine from iso course dust. The list price is reasonable at only $283.16. This intake is very easy to install with minimum tools.

Now that you have modified your intake, and your engine is breathing cool air more easily you are going to makes some changes to your egr and emissions system. This mod is going to be fairly expensive but will pay for it self with big power gains. First things first you want to remove your egr valve and egr cooler and install delete kits for both. Note this is for "off-road" use only and must be used with a DPF delete kit. The delete kit i recommend for the Egr/cooler is from Pure Cummins Diesel Performance, unlike others there kits keep the coolant in the block. Also you are going to have to mod your exhaust system, which means removing the nox absorber, cat, and dpf. This is a pretty extensive mod and you need a good set of tools and mechanical ability. If you not sure about your mechanical ability there are many reputible companies that will install aftermarket parts for you. I also do diesel performance and would be happy to perform the work if you're in the Corpus Christi area. You can contact me by email goldsmithdieselperformance@yahoo.com. The Dpf delete kit I recommend is on this site http://www.puredpfdelete.com/catalog/dodge/dodge-DPF-delete-electronics.php. you will have to remove the complete exhaust system install a jumper harness and emulator. I also recommend XRT Race Tuner XRT racing kits are engineered to take your 6.7L Cummins to the next level. Better flow, better throttle response, and HUGE POWER GAINS are just few of the advantages you will gain with an XRT racing kit from Pure DPF Delete. After these mods you will definitely see some big power gains. Next time we will talk about modding the low and high pressure fuel systems.

Thanks for reading,

Joe G

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Comments 9 comments

Justin Maxwell 6 years ago

I think this is a really good post and 100% true that emissions stuff was one of the worst things they could have done im a huge dodge fan but all these new engines are giving them a bad name.


Diesel Racing Kits 5 years ago

Thanks for your post. I have been having problems with emissions given away by my engine as well. I will try the things you've covered here.


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