The XDP Coolant Recovery Tank Reservoir Cap is the perfect solution for maintaining the integrity of your 2003-2016 Ford 6.0L/6.4L/6.7L Powerstroke. Often referred to as a Degas Bottle Cap or Expansion Tank Cap, this essential part ensures optimal performance by preventing leaks and potential cooling system failures. Made with durability in mind, this direct replacement offers peace of mind, superior functionality, and better long-term savings compared to aftermarket alternatives.