Add some durability and style to your truck using these Sinister Diesel 03 - 07 Powerstroke billet cap Unlike the OEM oil and filter caps, these wonrsquot crack from overtightening or just the passing of time. All three caps are blue, adding a nice splash of color to the underhood area of your truck. They also feature the Sinister Diesel logo, so everyone knows you value quality. Included is an Oil Filler Cap, Fuel Filter Cap, and Oil Filter Cap. Made of solid billet aluminum, all three caps in this 03 - 07 Powerstroke billet cap collection are precision CNC machined, ensuring excellent fitment on your 2003 to 2003 Ford Powerstroke 6.0L engine. FeaturesSolid Billet Aluminum Construction, Precision CNC Machined, Stronger and more reliable than the OEM plastic partsKit IncludesBillet Aluminum Oil Filler Cap, Billet Aluminum Fuel Filter Cap (tapped for 18 NPT), Billet Aluminum Oil Filter Cap (tapped for 18 NPT).