The Best First Mods for a 6.7L Cummins
When you buy a 6.7L Cummins-powered Ram, you're already working with one of the most reliable diesel engines ever built. Whether you're towing, daily driving, or planning a performance build, the right upgrades will dramatically improve power, reliability, and drivability.
Here are the six first mods every 6.7L Cummins owner should consider. Pick the year range that matches your truck as you go, because parts differ significantly between the 2007.5-2018 trucks and the 2019-and-newer trucks.
Shop by year: CR 6.7 Cummins (07-18) Parts | CR 6.7 Cummins (19+) Parts
1. Intake Upgrade - Better Airflow, Better Performance
The stock Cummins intake restricts airflow and limits power. Upgrading improves throttle response, reduces EGTs, and supports future mods.
What to look for: high-flow designs, smooth inlet paths, reduced turbo lag, and trusted brands like Banks, S&B, and aFe.
Shop intakes and cooling: 07-18 intakes and cooling | 19+ intakes and cooling
2. Exhaust and Turbo Backpressure Upgrades
Freeing up exhaust flow allows your turbo to spool faster and keeps EGTs under control, which matters most when towing or running a tune.
Shop turbochargers and exhausts: 07-18 turbochargers and exhausts | 19+ turbochargers and exhausts
3. Fuel System Protection (FASS / AirDog)
Air vapor, low fuel pressure, and dirty fuel kill injectors. A quality lift pump is one of the best reliability mods you can buy.
Benefits include cleaner fuel, proper pressure, longer injector life, and better throttle response.
This matters even more on 2019-2020 trucks running the Bosch CP4.2 pump. A CP4 failure sends metal debris through the entire fuel system at 26,000 PSI, turning a $2,000 pump job into a $10,000 to $15,000 repair. Clean, well-pressurized fuel is the cheapest insurance you can buy on those trucks.
Shop fuel systems: 07-18 fuel system | 19+ fuel system
Shop injectors: 07-18 fuel injectors | 19+ fuel injectors
Not sure whether your symptoms point to injectors or the pump? Read our breakdown of 5 signs your diesel injectors are failing before you spend money on parts.
4. Turbo Upgrade or Billet Compressor Wheel
Not ready for a full turbo setup? A billet wheel improves spool, reduces surge, and drops EGTs noticeably.
Shop turbos: 07-18 turbochargers | 19+ turbochargers
5. Monitoring and Tuning Tools
Monitoring tools like the Edge CTS3, Banks iDash, or Edge Pulsar protect your investment and keep your tuning safe. You'll be able to track boost, EGTs, fuel pressure, transmission temps, and regen cycles.
Shop tuning and monitors: 07-18 tuning | 19+ tuning
6. Transmission Upgrades (Especially for 68RFE Trucks)
The 68RFE is a known weak point. Upgrading it early prevents expensive failures. Recommended upgrades include shift kits, valve bodies, clutches, and line pressure tuning.
Shop transmissions: 07-18 transmissions | 19+ transmissions
Powerhouse Diesel - Your Source for Cummins Performance
Whether you're after reliability, towing performance, or full-on power, we have the parts and the shop experience to help you build the right 6.7L Cummins setup.
We carry Banks intake systems, S&B air filters, FASS lift pumps, Edge and Banks tuners, plus injectors, turbos, transmissions and more.
Shop all Cummins parts: 07-18 | 19+
Need help choosing the right mods? Give us a call at 865-640-2097 and tell us what the truck does for a living. Ten minutes on the phone beats buying the wrong part twice.
Powerhouse Diesel - Knoxville, TN. Diesel repair and performance parts, shipped nationwide. About us | More guides