I have done the vacuum booster conversion my UrS6.I used the booster
from the A6/100 C4.it came up with the large single diaphragm booster.
I'm thinking to get some dual diaphragm booster on my car since the
brake pedal is way too stiff IMO.I checked the RS4 booster.unfortunately,
the mounting bolts pattern on the firewall is different.it required the mods on
the mounting.it's PITA.anyone knows which dual diaphragm boost can fit
on the C4 chassis which requires minor mods on it.TIA.
from the A6/100 C4.it came up with the large single diaphragm booster.
I'm thinking to get some dual diaphragm booster on my car since the
brake pedal is way too stiff IMO.I checked the RS4 booster.unfortunately,
the mounting bolts pattern on the firewall is different.it required the mods on
the mounting.it's PITA.anyone knows which dual diaphragm boost can fit
on the C4 chassis which requires minor mods on it.TIA.