Yep I removed the DMF in my 2007 6.7L Cummins because the stock clutch in the new Cummins pickups does not cut it. In fact they derated the tune, 305 HP manual trans. vs. 350 HP for the automatic because the civility influenced design or the OEM clutch would not hold. The I6 has more and earlier torque for a clutch to hold than a V8. My 6.7L makes over 1000 ft/lbs. at 1000 rpm but the gear rollover noise caused by occilations without the DMF is such that I have to shutdown if I go to a drive-up window.

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1986 300 SDL - rolling parts car and test bed.
1987 300 SDL - semi daily driver.
1977 U1000 Unimog
2007 Ram 2500 6.7l