2019-2021 6.7L Cummins Platform

2019-2021 CMF Cummins

The 2019-2021 Cummins, like the earlier 6.7Ls uses an EGR and DPF system, but they were they first RPO to introduce the SCR with DEF. Like the earlier emissions systems, there are a lot of issues with them.

For tuning, EFILive is the platform of choice.  Ez Lynk is also another option, but similar to the 2010-2012s, the 2019-2021 Cummins 6.7Ls do not have a switchable option available on Ez Lynk. There are 5 individual tunes that you can choose between, but you have to load them to change power levels. We are also able to get MM3 tuning by request, but we don’t sell any MM3 hardware.

A tune alone can add roughly 160rwhp on the stock transmission. With the stock CMFs making about 370hp, a tune will bring them to about 530hp.

EFILive offers the option for either a single tune or a switch on the fly tune that uses a Fish Tuning CSP switch. This switch plugs right into the OBD2 port, so it’s a very easy install. You can get an AutoCal V3 loaded with the tune file, or if you already have to programmer, the tune file can be emailed to you. Each vehicle you flash with an AutoCal programmer requires a new license, but the AutoCal is capable of tuning hundreds of vehicles.

Ez Lynk also has a very simple flashing process. Using the Ez Lynk Auto Agent 3 plugged into your OBD2 port, you use an app on your smartphone to obtain your tunes, and flash them to the vehicle. It uses a cloud based system, so there is no physical file. This makes getting the tune files very quick, especially if you already have the programmer.

Transmission tuning is available for the 2019-2021 CMF Cummins that have the 68RFE transmission. The Aisin transmission do not have any TCM tuning available at this time. The tuning has the ability to adjust line pressure, shift pattern and timing, and torque converter lockup schedule. It helps to increase the holding capacity of the transmission, as well as match the shift pattern and torque converter lockup schedule to the new torque curve of the ECM tuning.