2011-2017 Ford Mustang 5.0 V8 Ignition Coil Covers by Roush Performance Made of the same reinforced nylon material used in Fords OE covers, this pair of Coil Covers by Roush Performance is a fast and easy way to improve the look of your engine bay. These covers are resistant to solvents and engine heat and are built to last. The part number for this item is Roush 422021 and it fits 2011-2017 Ford Mustang (5.0 V8 Models).