Tandem brake booster conversion - UrS4

[hunker7]

Tandem brake booster conversion kit has finally come back in stock at ultraperformance.co.uk. Description states that "suitable factory boosters may be taken from the following model platforms: B6, B7, B8, C6, C5 RS6, C6, C7, D3."

D3 seems to be pretty widely available, does it matter which year/part number I use?

Also could anyone confirm part number for single stage PAS pump required?

[89 Coupe]

Looks like the s2/rs2 single stage pump is back in stock too
Any idea on fitment with AAN? I'm trying to convert mine also.

https://www.ultraperformance.co.uk/a...stage-pas-pump

*Edit* It seems to be a direct swap!

https://www.s2forum.com/forum/technical/suspension-steering/32381-aan-servo-pump-to-adu

[Chris5044]

Its so cool that Error404 is making things to help support our vehicles and community <3 Super thankful. Amazing moves!

[89 Coupe]

Confirmed fitment of the Ultra Performance S2/RS2 Single Stage PAS onto my AAN tonight. It's making my vacuum power steering conversion a breeze!

p5pb24660622.jpg
p5pb24660610.jpg

[vag_noob]

Tandem brake booster conversion kit has finally come back in stock at ultraperformance.co.uk. Description states that "suitable factory boosters may be taken from the following model platforms: B6, B7, B8, C6, C5 RS6, C6, C7, D3."

D3 seems to be pretty widely available, does it matter which year/part number I use?

Also could anyone confirm part number for single stage PAS pump required?

How did you go with the booster?


Starting to plan this swap for the future but would also like to confirm parts fitment as my country has strict rules for certification, and I would like it to fit under the strut bar if possible, also don't want to spend a million dollars.


These parts seem reasonably priced.

https://www.fcpeuro.com/products/aud...vag-4f0612107f

https://www.fcpeuro.com/products/aud...4-s6-4b3611021

https://www.fcpeuro.com/products/aud...ger-8e0611301g

https://www.fcpeuro.com/products/aud...i-vw-4d0611243


Edit: woops I see that these appear to be the same parts that are listed on the ultraperformance website, in that case can anyone confirm if the larger diameter MC is suitable for URS4 with standard HP2 setup? Audi 100 boosters seem to be NLA.