[Vehicle Fitment]: Compatible with INFINITI EX37/FX37 2013, G37 2008-2013, M37 2011-2013, Q40 2015, Q50/Q60 2014-2015, Q70 2014-2019, Q70L 2015-2019, QX50/QX70 2014-2017; Compatible with Nissan 370Z 2009-2020---V6 3.7L. [Reference Number]: UF-617, 22448EY00A, 90174, DF8H11B. [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..
