Uhm, yes there are. At least on K-box.
My RS4 has (or had) rear O2's, cats, SAI and so on.

May I ask why? And they are probably exactly the same as M-Box, because the hardware is the same.
matchew pointed out that removal of SAI does not affect learning of fuel trims on K-Box.

One more thing: After studying ATM (exhaust gas temp model) I've found a way to update it for test pipes/decats.

First we have to set B_trkh = 0, B_kh =0, B_kw = 0 to fix tatmsta.

CWKONABG.0 = 0 >>> B_katfz = 0 >>> B_kha = 0 >>> B_trkh = 0
CWKONABG.0 = 0 >>> B_katfz = 0 >>> B_kh =0
TKATW = F(max) >>> B_kw = 0

Now we have to fix two subfunctions for TIKATM and TKATM variables by setting these values:
ZATMIKML = 1 && ZATMIKKML = 1 && texoikm_w = 0 (TABGMEX = F(max) && TIKATMOE = 0) >>> tikatm_w = tabgm

ZATMKML = 1 && ZATMKKML = 1 && texom_w = 0 (TABGMEX = F(max) && TKATMOE = 0) >>> tkatm_w = tabgm

UPDATE: One more interesting thing with these models that I found is that until start up timer passes all these variables are preset to TATMTP map, which in most files is set to 60 C. That means, that for some time after starting engine ecu will think that your EGTs are 60 degrees...

SUMMARY:
CWKONABG.0 = 0
TKATW = F(max)
TABGMEX = F(max)
TIKATMOE = 0
TKATMOE = 0
ZATMIKML = 1
ZATMIKKML = 1
ZATMKML = 1
ZATMKKML = 1


Here's hoping there won't be any problems in other functions (haven't looked through all of them yet)

I have started (again) to gather info on variables that we change with map changes. At the moment I have written PROKONAL, LRSHK, LRSKA functions variables, but I will add more when I'll have time

LEFT SIDE - sorted by functions
RIGHT SIDE - all variables sorted by variable name

Now If you wan't to generate graph out of this data then just use yEd Graph Editor and feed the right side

If anyone has some free time and want to play with dissassembly then it would be a good idea to check if variables are really created and read like FR doc shows us.. Also there are some variables with ? ? ? - that means I haven't found out what happends to these variables after ouput from ori function (FR document)

Also, I'll delete some of these maps when I check all the functions and find out that they can be overwritten by other maps to keep the map list as short as possible.

Another thing: This isn't same list as at the end of FR document, because this includes EVERY single functions that mentions said variables, for example DIMC function isn't shown in the end as few others

Update 

I started trying to correctly code out my rear o2s and SAI. I have set the various codeworts from phila_dots post on page 9, and have found ESKONF at 10D27 in my bin (018ch). I set all the codewords, but did not change ESKONF, then went for a drive. I threw a code for open circuit sensor 2, but the MIL was not lit up. So I went back and changed ESKONF, the 3rd bit. It was originally 048, but I changed it to 240. The DTC is now gone, but the readiness shows incomplete or not ready. The post-cat o2 sensor heater is still being activated, I can see the request through measuring blocks in VAGCOM.

This is what I have done:

CDKAT = 0
CWDLSAHK = 0
CDHSH = 0
CDHSHE = 0
CDLATV = 0
CDLASH = 0
CDLSH = 0
CLRSHK = 5
CWKONLS = 1
ESKONF - as described above

Could CDLSHV cause this problem? That is the only codeword I can't find in my XDF/.kp. I see CDLSHV in the FR but I couldn't find what it does.

Wideband ECU?

What are you seeing in VCDS? B_hshe?

What isn't passing readiness O2 sensors or O2 heaters?

Log the cycle and error flags listed in DIMC to see exactly why readiness isn't complete.

CDLSHV is the codeword for function DLSHV which tests if the post cat O2's are interchanged/swapped between B1 and B2. The only outputs are lamlshv_w to %LAMKO and DTC P3262. This doesn't affect readiness.

Yes, wideband ECU. I am not quite sure of the name of the value in VCDS, but I believe it was block 041. The o2 sensors were not passing readiness, but I just put more miles on it and checked again and they all read PASSED!    But now I'm throwing a code for b1s1 malfunction in circuit, though I believe that is unrelated. Now the question is if Jersey will pass inspection on my car.