Replace your faded, pitted or broken oil cap with a brand new oil cap or valve cover breather today. Keep your mustang Engine Bay looking factory fresh with a new Ford Original Mustang Oil Fill Cap. But if you're a Mustang owner who dreams of a decked out Engine Compartment, make those dreams a reality & start by adding a Chrome or Billet Oil Cap. If a valve cover breather is what you need, you can look good with that too with our chrome capped Valve Cover Breathers.