2012 X5 3.0d Swirl Flap Delete ECU Reflash?

[FWDrofl]

Hello, I know this topic has been touched on numerous times but I cannot find the particular information I'm looking for.

I have a 2012 X5 3.0D, its reaching 77k, I avg about 21mpg (not great). Car is fitted with an M57N2 motor and from what I've seen on realoem my car has swirl flaps. I was planning on towing my m3 to a track day this weekend, (have towed with this setup before) and I was going to get some light maintenance done to the X5 this week and wondering if I should do the swirl flap delete on top of the carbon cleaning I'm going to have done.

My question IS: does the removal of the swirl flaps require an ECU re-flash and will the aluminum block off plates throw a CEL? (first question might answer the second). If I am going to go with the swirl flap delete - would it be worth it to also delete the EGR/SCR/DPF? (I know this will require a re-flash)

thanks

[328 Power 04]

Swirl flaps do throw errors in all the VW/Mercedes diesel stuff I've seen, with the same exact injection and ecu control systems.

[MarcoZandrini]

Just out of curiousity, what do swirl flaps do? Do all turbo’s engines have them? Do I have them on my 2018 M240i? Thanks!

[FWDrofl]

They aid cylinder combustion by regulating air through the manifold, BMWs after 2013 dont have this issue.