This new Sinister Diesel Oil Fill Cap functions like a factory cap, but features custom Sinister Diesel looks. The cap fits 1999-2010 Powerstroke engines and 2007.5-2019 Dodge/Ram Cummins engines. It is made from CNC machined, solid billet T6-6061 aluminum Available in gray or Sinister Blue, this cap looks as good as it works! Features: Anodized in Sinister Blue CNC Machined from T6-6061 Billet Aluminum Etched Sinister Diesel Logo Direct replacement for factory cap Fits 1999-2010 Powerstroke engines Fits 2007.5-2019 Dodge Cummins Includes: (1) Sinister Diesel Oil Fill Cap FAQs Q: What kind of finish is on this part? A: This product has a blue anodized finish for extra protection and a clean and stylish appearance.