So... anyone been able to bolt these into a B5 A4? Lots of posts mentioning they will go in, but no one has proven it. Are they the same as the B5 RS4 aluminum uprights? What are the part numbers for: B5 S4 uprights B5 RS4 uprights B6 A4 Uprights I can't even find the PNs google searching. Please help... I haven't got answer to this in almost a year.