We get this question a lot. As there are a lot of "tuners" that tell customers you can delete the EGR valve with no effect on the DPF. They couldn't be more wrong. Yes you can delete the EGR and leave the DPF, but the DPF is going to block up very quickly when it discovers the emission system is working like it should. Lets note forget the EGR lowers emissions at idle. Deleting it is going to increase the soot load on the DPF and it WILL block.
If you've been to a tuner that has told you otherwise, run to the hills.