Take it to an authorized SVT FORD dealership. The dealership will do the best work, no guesing, fixed right the first time, and FORD'S warranty! I take mine to Koon's in Baltimore, there is only one mechanic that works on my car, and only one service advisor, they both know me on a first name basis. If they do a good job, send the manager owner everyone a letter of praise for anyone involved in fixing your car. From then on you'll be treated like GOLD.