Thank you for taking a look at Four Rings Auto American made Skid plates for Audi B9 and B9.5 Cars A4 (FWD and Quattro) A5 (Quattro 2.0T and 2.0T Sportback) S4, S5 coupe, RS5 2016-present. The skid plates are made of 5052 1/8" thick aluminum and all necessary hardware is included. We at Four Rings Auto Service and Sell Audi and VW we saw a need for a better solution to the stock plastic skid plate that break or get ripped off if your car is lowered or hit something. This skid plate helps protect against that.