Installed them on the back of my A4 B8 3.2 with no problems. These are STOPTECH SS rear brake hoses that come in Stoptech packaging. Very good for the price! All A4 B8 models have the same brakes and calipers. The S4 has different brake pads and discs. So if you have an A4 and are looking for good inner tubes then this is the one for you! They fit and braking feels firmer.