i done mine on my s2 when doing my resto, the back is harder than the front, the only prob you will have will be gettin the old fuckers off, i used a blow torch and a hammer to get my old ones off. the new ones just press in. i went for deflex there ok, but they didnt come labeled, they have a shop on ebay, type in flo-flex, 100 quid for a car set

if you want powerflex the best on the market you looking around 250 for a car set i think cant remember these are a better bush than the deflex ones.