The new Sinister Diesel fuel caps for the 6.4L and 6.7L Power Strokes are stylish and durable options to keep dirt and moisture from entering your fuel tank! Sinister's factory uses a small, flimsy plastic plug, and they CNC-machine them from billet aluminum with a tight o-ring seal. They're laser-etched with the Sinister logo, and they come anodized in blue, gray, or green. They come at a price of only $59. For more information, call 888-966-6543 or click here.
Photo credited to SinisterDiesel.com