After you have your engine set up the way you want it, it's time to focus on the exterior appearance of your truck. Ford trucks are arguably the most popular trucks on the market and routinely outsell the competition. In 2012, the Powerstroke far outsold both the Cummins and Duramax competitors. As a result, you can't drive anywhere without seeing a few Super Duty trucks on the road. While diesel performance parts under your hood can make you stand out from the crowd, it's also important to customize the exterior of your truck to reflect your personality. A new grille, lights or fender flares are great additions to any Ford truck and will make heads turn when you drive by.