No it won't be "OK" with CARB... they will look for the EGR valve, and fine you for modifying the emissions. Further, you will lock yourself out of both the truck and engine manufacturer's shops... the EPA is now requiring them to impound trucks with emission systems that have been modified from manufacturer's spec (unless you've added a DPF) - and not release those trucks until the emission system has been brought back to original spec.mn is correct. If you remove the egr and somehow recode and then install the 2 stage SCR module with the DEF nozzle in the middle and a DPF you are way cleaner than the EGR. I think this would be ok with carb. They would probably charge you 200 bucks to have them do a test on the exhaust.
What sucks is the old organized ripoff prices for the Owner op. That SCR module should cost about 2000$. Its a little bigger than a CAT conv. for a pick up.
But the slime that sells to truckers would want 10,000. Its NOT worth that but they know that most truckers are no smart enough to understand they are being ripped off and
wont say anything. From what I have seen 80% of truckers are simpletons.I hate to say it but its true. They havent a clue how to organize and not be taken advantage of.
The 20,000 bucks Owner ops are paying for aftermarket DPFs is a good example. That aftermarket system is not worth a dime more than 5000. But guys line up and pay whatever they are told to. They dont understand they are being had.