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. AUDI 2006-02; GM 2010-89; CHR/DOD/EAG/PLY 2005-91; FORD/MERC 1997-91; HON/ACU 2001-91; NIS/INF 2004-89; KIA 2005-95; MAZ 1994-90; M-BENZ 2011-02; MITS 2004-91; SUB 2012-90; TOY/LEX/SCI 2012-90; VOL 2011-05, M/C - 2008-01 HON

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

Designed for the performance enthusiast, NGK Iridium IX spark plugs offer outstanding acceleration, high fuel efficiency, and exceptional durability. Featuring a tapered cut ground electrode, these plugs improve starting, idle stability, and throttle response, making them ideal for modified or high-performance applications. The fine iridium tip ensures a durable, consistent spark with extreme ignitability and resistance to fouling, supporting optimal engine performance across various driving conditions. The iridium alloy’s high melting point and the platinum-rich trivalent metal plating provide superior corrosion resistance and longevity, reducing the need for frequent replacements. These plugs are suitable for a wide range of vehicles, including Mercedes-Benz, Audi, Land Rover, and others, ensuring a reliable upgrade over standard nickel alloy spark plugs. Perfect for enthusiasts seeking enhanced engine responsiveness and fuel efficiency, NGK Iridium IX plugs deliver consistent performance in both daily driving and spirited driving scenarios. Installing these plugs can contribute to smoother acceleration, improved throttle response, and extended engine life, making them a valuable addition to any high-performance or modified vehicle. Each box contains four spark plugs, ready to provide long-lasting, high-quality ignition performance for compatible vehicles.

Features: