Hi, I have a 1999 1.8TQS saloon and I want to ugrade the brakes. I'm getting together my shopping list for the parts I need. First off is the B5 S4 uprights. I know you can fit the lighter B6 ones but I'm led to believe you then have to change the bottom arm (which I don't want to do as I've just forked out for brand new Meyle ones). The part numbers I have for the B5 S4 uprights off EKTA are 4B3 407 253G and 4B3 407 254G (left and right). Is this correct? However on ebay at the moment is apparently a B5 S4 upright that is listed as part number 4B3 407 257 which if you google it comes up as an A6 Quattro upright. I'm sure I also read in a build thread that someone used this part, as I made a note of it and it is the same. I want to make sure I get the right bits so I'm tempted to get the uprights new from the dealers as I don't want to buy something off ebay, strip the car down, only to find it's wrong! Been there done that before! Will I need a chassis number for the dealer or will the part numbers alone suffice? I want to make 100% sure I get the right uprights to fit my car as I want to upgrade to B6 S4 fronts. Any pointers would be appreciated.