NGK IX Iridium Spark Plug Box of 4 (LKR7AIX)

NGK Iridium IX spark plugs are specifically designed for the performance enthusiast. Iridium IX provides outstanding acceleration, high fuel efficiency and durability. NGK Iridium IX plugs offer extreme ignitability and exceptional anti-fouling. Tapered cut ground electrode provides improved starting, idling and throttle response. The Iridium fine wire center electrode's durability is six times harder than platinum. Iridium alloy's extremely high melting point is perfect for today's engines. For even greater performance consider upgrading to an NGK Ruthenium HX plug. NGK Iridium IX spark plugs are specifically designed for the performance enthusiast. Iridium IX provides outstanding acceleration, high fuel efficiency and durability. 2014-11 Chrysler 300, Dodge Challenger/Charger, Jeep Grand Cherokee

• RECOMMENDED USAGE: Modified or high performance applications, or as an upgrade to OE nickel alloy spark plugs
• Trivalent metal plating for superior anti-corrosion and anti-seizing properties
• Outstanding acceleration, high fuel efficiency and durability
• Fine iridium tip ensures durable and consistent spark

Upgrade your ignition system with NGK Iridium IX spark plugs, part number 93911, featuring the LKR7AIX plug design. Engineered for performance enthusiasts and modified applications, these automotive spark plugs deliver outstanding acceleration, reliable fuel efficiency, and long-lasting durability. The fine iridium center electrode promotes exceptional ignitability and provides a consistent spark for dependable engine performance.
The tapered-cut ground electrode supports improved starting, smoother idling, and sharper throttle response while helping resist fouling. Iridium alloy has an extremely high melting point, making it well suited for the demanding temperatures found in today’s engines. The fine-wire center electrode is substantially harder than platinum, helping maintain spark performance over extended service intervals. This box includes four NGK Iridium IX spark plugs for convenient replacement or installation as a complete set.
NGK 93911 Iridium IX spark plugs are recommended for modified or high-performance applications and as an upgrade from original-equipment nickel-alloy spark plugs. Trivalent metal plating provides superior resistance to corrosion and helps prevent seizing during installation and future service. These plugs are listed for select 2009–2011 Mercedes-Benz C300 applications and may also fit certain Chrysler 300, Dodge Challenger, Dodge Charger, and Jeep Grand Cherokee configurations; verify the exact vehicle, engine, and manufacturer spark plug specification before purchase. For an alternative performance upgrade, consider NGK Ruthenium HX spark plugs.

Features:

• Fine iridium tip ensures a durable, consistent spark

• Tapered-cut ground electrode improves starting, idling, and throttle response

• Designed for modified and high-performance applications or as an upgrade from OE nickel-alloy plugs

• Delivers outstanding acceleration, fuel efficiency, and durability

• Trivalent metal plating provides superior anti-corrosion and anti-seizing protection

• Iridium alloy withstands the high temperatures found in modern engines

• Box includes four NGK Iridium IX spark plugs

Fitment:
Dodge Sprinter 2500 Base 2007
Dodge Sprinter 2500 Base 2008
Dodge Sprinter 3500 Base 2007
Dodge Sprinter 3500 Base 2008
Freightliner Sprinter 2500 Base 2007
Freightliner Sprinter 2500 Base 2008
Freightliner Sprinter 3500 Base 2007
Freightliner Sprinter 3500 Base 2008
Kia Soul Base 2010
Kia Soul Base 2011
Mercedes-Benz C230 Sport 2006
Mercedes-Benz C230 Sport 2007
Mercedes-Benz C250 Base 2012
Mercedes-Benz C250 Base 2013
Mercedes-Benz C250 Base 2014
Mercedes-Benz C250 Luxury 2012
Mercedes-Benz C250 Luxury 2013
Mercedes-Benz C250 Luxury 2014
Mercedes-Benz C250 Sport 2012
Mercedes-Benz C250 Sport 2013
Mercedes-Benz C250 Sport 2014
Mercedes-Benz C280 4Matic 2006
Mercedes-Benz C280 4Matic 2007
Mercedes-Benz C280 Luxury 2006
Mercedes-Benz C280 Luxury 2007
Mercedes-Benz C300 4Matic Luxury 2008
Mercedes-Benz C300 4Matic Luxury 2009
Mercedes-Benz C300 4Matic Luxury 2010
Mercedes-Benz C300 4Matic Luxury 2011
Mercedes-Benz C300 4Matic Luxury 2012
Mercedes-Benz C300 4Matic Sport 2008
Mercedes-Benz C300 4Matic Sport 2009
Mercedes-Benz C300 4Matic Sport 2010
Mercedes-Benz C300 4Matic Sport 2011
Mercedes-Benz C300 4Matic Sport 2012
Mercedes-Benz C300 Luxury 2008
Mercedes-Benz C300 Luxury 2009
Mercedes-Benz C300 Luxury 2010
Mercedes-Benz C300 Luxury 2011
Mercedes-Benz C300 Sport 2008
Mercedes-Benz C300 Sport 2009
Mercedes-Benz C300 Sport 2010
Mercedes-Benz C300 Sport 2011
Mercedes-Benz C350 4Matic 2006
Mercedes-Benz C350 4Matic 2007
Mercedes-Benz C350 Luxury 2006
Mercedes-Benz C350 Luxury 2007
Mercedes-Benz C350 Sport 2006
Mercedes-Benz C350 Sport 2007
Mercedes-Benz C350 Sport 2008
Mercedes-Benz C350 Sport 2009
Mercedes-Benz C350 Sport 2010
Mercedes-Benz C350 Sport 2011
Mercedes-Benz CL550 4Matic 2009
Mercedes-Benz CL550 4Matic 2010
Mercedes-Benz CL550 Base 2007
Mercedes-Benz CL550 Base 2008
Mercedes-Benz CLK350 Base 2006
Mercedes-Benz CLK350 Base 2007
Mercedes-Benz CLK350 Base 2008
Mercedes-Benz CLK350 Base 2009
Mercedes-Benz CLK550 Base 2007
Mercedes-Benz CLK550 Base 2008
Mercedes-Benz CLK550 Base 2009
Mercedes-Benz CLS550 Base 2007
Mercedes-Benz CLS550 Base 2008
Mercedes-Benz CLS550 Base 2009
Mercedes-Benz CLS550 Base 2010
Mercedes-Benz CLS550 Base 2011
Mercedes-Benz E350 4Matic 2006
Mercedes-Benz E350 4Matic 2007
Mercedes-Benz E350 4Matic 2008
Mercedes-Benz E350 4Matic 2009
Mercedes-Benz E350 4Matic 2010
Mercedes-Benz E350 4Matic 2011
Mercedes-Benz E350 Base 2006
Mercedes-Benz E350 Base 2007
Mercedes-Benz E350 Base 2008
Mercedes-Benz E350 Base 2009
Mercedes-Benz E350 Base 2010
Mercedes-Benz E350 Base 2011
Mercedes-Benz E550 4Matic 2007
Mercedes-Benz E550 4Matic 2008
Mercedes-Benz E550 4Matic 2009
Mercedes-Benz E550 4Matic 2010
Mercedes-Benz E550 4Matic 2011
Mercedes-Benz E550 Base 2007
Mercedes-Benz E550 Base 2008
Mercedes-Benz E550 Base 2009
Mercedes-Benz E550 Base 2010
Mercedes-Benz E550 Base 2011
Mercedes-Benz G550 Base 2009
Mercedes-Benz G550 Base 2010
Mercedes-Benz G550 Base 2011
Mercedes-Benz G550 Base 2012
Mercedes-Benz G550 Base 2013
Mercedes-Benz G550 Base 2014
Mercedes-Benz G550 Base 2015
Mercedes-Benz GL550 Base 2008
Mercedes-Benz GL550 Base 2009
Mercedes-Benz GL550 Base 2010
Mercedes-Benz GL550 Base 2011
Mercedes-Benz GL550 Base 2012
Mercedes-Benz GLK350 4Matic 2010
Mercedes-Benz GLK350 4Matic 2011
Mercedes-Benz GLK350 4Matic 2012
Mercedes-Benz GLK350 Base 2010
Mercedes-Benz GLK350 Base 2011
Mercedes-Benz GLK350 Base 2012
Mercedes-Benz ML350 4Matic 2006
Mercedes-Benz ML350 4Matic 2007
Mercedes-Benz ML350 4Matic 2008
Mercedes-Benz ML350 4Matic 2009
Mercedes-Benz ML350 4Matic 2010
Mercedes-Benz ML350 4Matic 2011
Mercedes-Benz ML350 Base 2009
Mercedes-Benz ML350 Base 2010
Mercedes-Benz ML350 Base 2011
Mercedes-Benz ML450 Hybrid 4Matic 2010
Mercedes-Benz ML450 Hybrid 4Matic 2011
Mercedes-Benz ML550 Base 2008
Mercedes-Benz ML550 Base 2009
Mercedes-Benz ML550 Base 2010
Mercedes-Benz ML550 Base 2011
Mercedes-Benz R350 4Matic 2006
Mercedes-Benz R350 4Matic 2007
Mercedes-Benz R350 4Matic 2008
Mercedes-Benz R350 4Matic 2009
Mercedes-Benz R350 4Matic 2010
Mercedes-Benz R350 4Matic 2011
Mercedes-Benz R350 Base 2008
Mercedes-Benz R350 Base 2009
Mercedes-Benz S350 Base 2006
Mercedes-Benz S400 Hybrid 2010
Mercedes-Benz S400 Hybrid 2011
Mercedes-Benz S400 Hybrid 2012
Mercedes-Benz S400 Hybrid 2013
Mercedes-Benz S550 4Matic 2007
Mercedes-Benz S550 4Matic 2008
Mercedes-Benz S550 4Matic 2009
Mercedes-Benz S550 4Matic 2010
Mercedes-Benz S550 4Matic 2011
Mercedes-Benz S550 Base 2007
Mercedes-Benz S550 Base 2008
Mercedes-Benz S550 Base 2009
Mercedes-Benz S550 Base 2010
Mercedes-Benz S550 Base 2011
Mercedes-Benz SL550 Base 2007
Mercedes-Benz SL550 Base 2008
Mercedes-Benz SL550 Base 2009
Mercedes-Benz SL550 Base 2011
Mercedes-Benz SL550 Base 2012
Mercedes-Benz SLK250 Base 2012
Mercedes-Benz SLK250 Base 2013
Mercedes-Benz SLK250 Base 2014
Mercedes-Benz SLK250 Base 2015
Mercedes-Benz SLK280 Base 2006
Mercedes-Benz SLK280 Base 2007
Mercedes-Benz SLK280 Base 2008
Mercedes-Benz SLK300 Base 2009
Mercedes-Benz SLK300 Base 2010
Mercedes-Benz SLK300 Base 2011
Mercedes-Benz SLK350 Base 2005
Mercedes-Benz SLK350 Base 2006
Mercedes-Benz SLK350 Base 2007
Mercedes-Benz SLK350 Base 2008
Mercedes-Benz SLK350 Base 2009
Mercedes-Benz SLK350 Base 2010
Mercedes-Benz SLK350 Base 2011
Mitsubishi Outlander ES 2007
Mitsubishi Outlander GT 2010
Mitsubishi Outlander GT 2011
Mitsubishi Outlander GT 2012
Mitsubishi Outlander GT 2013
Mitsubishi Outlander LS 2007
Mitsubishi Outlander LS 2008
Mitsubishi Outlander XLS 2007
Mitsubishi Outlander XLS 2008
Mitsubishi Outlander XLS 2009
Mitsubishi Outlander XLS 2010
Mitsubishi Outlander XLS 2011
Smart Fortwo Brabus 2009
Smart Fortwo Brabus 2010
Smart Fortwo Passion 2008
Smart Fortwo Passion 2009
Smart Fortwo Passion 2010
Smart Fortwo Passion 2011
Smart Fortwo Passion 2012
Smart Fortwo Passion 2013
Smart Fortwo Passion 2014
Smart Fortwo Passion 2015
Smart Fortwo Passion Cabrio 2008
Smart Fortwo Passion Cabrio 2009
Smart Fortwo Passion Cabrio 2010
Smart Fortwo Passion Cabrio 2011
Smart Fortwo Passion Cabrio 2012
Smart Fortwo Passion Cabrio 2013
Smart Fortwo Passion Cabrio 2014
Smart Fortwo Passion Cabrio 2015
Smart Fortwo Pure 2008
Smart Fortwo Pure 2009
Smart Fortwo Pure 2010
Smart Fortwo Pure 2011
Smart Fortwo Pure 2012
Smart Fortwo Pure 2013
Smart Fortwo Pure 2014
Smart Fortwo Pure 2015