Simon,
EGR & DPF Deletes have all sorts of pro's and cons.
to be honest, in all the research i have done, i cant come to a consensus on it at the moment myself.
Ive been thinking of doing the same thing on my A8 3l tdi. Stage 2 Tune about 340bhp with a tuner i know!
Hes not exactly sure what torque figure but its fairly impressive.
If cat is still in, you might pass the emmisions tests but not definite!
If the EGR isnt there any more and the engine is no longer breathing its own gasses, then surely theres going to be alot less carbon buildup in the engine.
Maybe a bit dirtier smoke wise tho.
Only way to decide for yourself is to talk to the people that do it and not just a "Why should i do it", but more of a "If i do this, whats the effect? Whats the alternatives" kinda conversation. Im still on the fence but seriously starting to sway towards a decision!
Heres a couple of sites i have been reading thru for info
https://www.dieseldoctor.ca/blog/advantages-and-disadvantages-of-an-egr-delete
https://www.a5oc.com/threads/egr-delete-keep-dpf.179378/#:~:text=It shouldn't cause any,fuel ratios at low load.
https://forums.tdiclub.com/index.php?threads/dpf-egr-delete-worth-it.518108/
https://essextuningltd.co.uk/egr-delete-advantages
https://www.parkmuffler.com/blog/diesel-delete-kits-dpf-def-egr/
https://www.boards.ie/discussion/2056872619/dpf-egr-removal-advantages-disadvantages
https://www.audi-sport.net/xf/threads/159455/
I could go on giving links all day, but its fairly pointless cause anyone can google as well as i can.
Have a chat with the tuner that your considering, have a read about it and decide for yourself.