Roush polished billet aluminum radiator cap cover. For 1996-2014 Mustang, 1997-2017 F-150, etc..These fit over the top of your radiator cap and use the installed 2 way tape to secure.
This also fits many other ford products that use this style cap. There are some cross reference photos supplied showing what other vehicles use this style cap.
Fits the OEM ford cap, may fit aftermarket caps too but I cannot guarantee that.
I have 20 of these, never installed, but open package, and they have a few small knicks from being handled. Please see pictures for examples. You would have to hold it in-front of your face to see imperfections. Installed on the car standing in-front of it you likely won’t notice the blemishes. Sold as is.
***pictured is the style radiator cap it fits, please make sure this is what your cap looks like before ordering.