Engine and transmission skid plates including hardware fits Audi C7 and C7.5 Cars A6 A7 S6 S7 RS7. The skid plates are Made of 5052 4mm thick Aluminum. All necessary hardware is included along with complete instruction sheet. 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 plates help protect against that.