I cant change my car at all. i want to lower it 30mm, put on some 17" TSW Volcanos and tint the windows. Insurance have said that they will not insure me if i change anything at all. so yeh. its shite. 20mm spacers on the back? do you need the extention studs or are they just a plate? got 5mm spacers on my Mini and obv need no stud extentions.