This Sinister Diesel fuel filter cap is a great upgrade for your 2003 - 2007 Ford F - Series with a 6.0L Powerstroke engine. No more worries about cracking the factory plastic cap! Crafted from 6061 T6 Aluminum and anodized blue for a top - notch finish. It's for the filter on the engine, not the frame. The billet aluminum construction ensures durability, and the kit includes the Sinister Diesel Fuel Filter Cap. Part Number: SD - FFC - 6.0.

Using this fuel filter cap is easy. First, make sure your engine is off and cooled down. Then, remove the old factory plastic cap from the engine - located fuel filter. Take your new Sinister Diesel fuel filter cap and screw it on tightly. That's it! As for maintenance, you don't need to do much. Just check it periodically for any signs of damage or looseness. If you notice any issues, replace it right away. And always keep it clean to ensure a long lifespan. Note that this cap is for the engine - located filter, not the one on the frame, so make sure you're using it in the right place.