Ford Motorcraft 4 Oz. Bottle Of Friction Modifier Additive For Limited Slip Differentials is a direct fit for the following:

Fits Any Vehicle With Rear Slip Differentials
-Fits Mustangs, F-150 & More!
-Required When Doing Any Rear Differential Service To Vehicles Equipped With A Limited Slip!
-Includes ONE (1) 4 oz. Bottle

Genuine Ford Part Number: XL-3