I was quoted $1500 shipped free for the FRPP Upgrade Half-Shafts Kit from AutoNation Ford of White Bear Lake, MN. Best price I've found. I've been shopping Roush dealers for a '15 A6 with the Roush/FRPP 627hp Supercharger Kit as a dealer installed option with warranty. No way would I risk taking that car down the 1/4 with DR's on the stock half-shafts...