Originally Posted by SRT6776
Yes and now they are sending huge fines to performance shops

That's why prices on 2004 and older Diesel Rams have gone through the roof.
The last of the Cummins Rams with ZERO emissions stuff on them. grin
So you can still do pretty much whatever you want to them & flip off the EPA. whistling

The trick now is getting hold of the tuners & parts while you can still get them.
And then hope for a governmental swing back to reality in 3 1/2 yrs when working stiffs are sick of paying $6/gal.