Looks like a cam cap bolt. Gotta drill out the bolt and retap it if the threads are damaged. Be very careful when tightening these bolts, do not go over the recommended torque limit.
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2015 Ford Mustang GT Fastback - Ingot Silver - 6M - Performance Package - Gibson Catback, JLT CAI, FR 47lb injectors, BAMA E85 tune, Eibach Sportline, BMR wheel hop kit, UPR oil separator, Steeda shifter bushing/bracket
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