Hi Christophe. Good to see another allroad! Unfortunately I cannot answer your question from memory, but in the future when I get the chance I will see if I can find out for you. Aswell as my 2003 RS6 I also have an allroad, a 2.5tdi - 2001 model. I fitted my old RS6 ARB's to the allroad after upgrading the RS6 to Hotchkis but unfortunately the rear bar really does not fit properly as it contacts the air compressor and causes a lot of vibration noises. I tried moving the air compressor slightly and a few other things but to no avail. I did a small writeup on the install on another forum:
http://www.vwaudiforum.co.uk/forum/show ... 01-Allroad .
In the end I bought a Hotchkis set for the allroad as well and found them to be a huge improvement over the RS6 standard bars.
I have also done a full C5 RS6 brake conversion on the allroad, front and rear, and at the moment am installing some 380mm discs on the front. The improvement in braking is much required and was a great upgrade.
Finally, I have full decat, a remap and also a tuning box. I believe the power is around 220bhp and 350lb/ft - quite satisfyingly torquey and very nice sounding too for a diesel.
Things were not perfect with this car though, unfortunately it suffered a major engine failue a couple of years after I bought it, so I changed the old AKE engine for a much newer 2007 BDG engine froma Skoda! I did a write up on that too:
http://www.vwaudiforum.co.uk/forum/show ... lure/page4
Right now I have the allroad in bits again, I have stripped the air suspension and the complete front and rear subframes and am refurbishing the car from the bottom up! It was getting very rusty on the subframes and the old air suspension was pretty much shot so I have brand new replacements to fit. I just went for standard replacements, not Arnott or any other type. I will probably make a thread on the VWAF forum later on when I get the job completed.
Good luck with your upgrades and if you need any allroad advice I may be able to help! Cheers, Angus