I put powerflex black bushes on the rear of my touran (the inner rear toe bush) to stop wear of the rear tyres.. big issue on tourans coz of the weight. (touran is virtually the same chassis as the golf - is why I'm mentioning it).
I didn't notice a noisier rear end tbh but then it is slightly different to the golf as in the size and weight. If I was to fit bushes to my golf i'd go for either the super pro stuff or the powerflex purple which is designed for road use, the black series is for race/track use really.
