[Vehicle Fitment]: Compatible with Ford F-150 2011-2016 V8 5.0L(To 02/05/2016), Compatible with Mustang 2011-2015 V8 5.0L. [Reference Number]: UF622, DG542, BR3Z-12029A, 5C1859, SP548, CYFS-12-F1, 91276. [Iridium spark plug]: Iridium is a type of refined alloy which is highly suitable to be used as the materials of the central electrode in a spark plug. It extends the life of the spark plug nearly threefold, ensures a more stable idle speed of the engine, and delivers a super performance to the engine with improved fuel efficiency, reduced emissions and faster starting up..
