Driveshafts Audi S4/RS4/A4 B5 quattro Rear Drive shafts Audi S4/RS4/A4 B5 quattro for large knots. This is so-called "failure steel shafts" Extremely strong, made of special tool steel that is hardened to the right flexibility for best durability and to protect the driveline. Fits: S4 B5 quattro rear RS4 B5 Quattro rear A4 B5 Quattro with large splines (38 splines) check this before ordering. rear Suitable drive hubs: SKF 5261 (outer) SKF 8005 (inner) Guarantee Manufacturers provide a quality guarantee on these. Should you break a drive shaft, you get a new one. Requirements: Send in the one you wrecked together with a receipt for the purchase. No one has managed to break a drive shaft since the start of production in 2013 NOTE Sold individually