After searching the Internet with no luck I'm turning to you experienced people. There's loads of threads and information on the B7 platform but nothing on the B8 about swapping my rear ARB for that off a RS4. So these are the apparent specs for the B7: SE bar = 16mm S Line bar = 18mm S4 bar = 20mm RS4 bar = 22mm Is the B8 similar in terms of size? The reported handling gains from changing this are apparently massive, greatly reducing understeer and body roll. From the dealer the ARB is only £80 for the RS4, allot less than any aftermarket part. Thanks in advance, brad.