Audi 90 Quattro 1990 Rear Subframe Bushes

[Olli]

I am in the process of renewing the rear subrframe bushes. Unable to 
locate the rear subframe bush part no 895 599 125. Near despate I found 
out that one can only replace the inner ( actual bush ) part inside the 
metal housing with part no 171 199 214 ( VW ), labeled engine mount. The 
only part I was able to locate is
171 199 214 G. Anybody than this, what does the "G" stand for? Rgs, Olli.