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. BUICK 2011-88; CADILLAC 2011-82; CHEV 2014-92; FORD/LIN/MERC 2014-78; GMC 2014-96; ISUZU 1999-97; JAGUAR 2002-00; MAZDA 2007-91; OLDSMOBILE 2003-88; PONT 2008-88; SATURN 2006-05, I/O - 2005 CRUSADER, 2005-94 INDMAR, 2006-00 MERC

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, the NGK IX Iridium Spark Plug Part Number 7164 offers outstanding acceleration, high fuel efficiency, and exceptional durability. This spark plug features a fine iridium tip that ensures a durable and consistent spark, contributing to smoother engine operation and improved throttle response. The tapered cut ground electrode enhances starting, idling, and overall engine responsiveness, making it an ideal upgrade for high-performance vehicles or modified engines. Crafted with iridium's high melting point and extreme hardness, these plugs are built to withstand the demands of today's engines, providing long-lasting performance without frequent replacements.
NGK's trivalent metal plating on these plugs offers superior anti-corrosion and anti-seizing properties, ensuring reliable operation over time. The design is suitable for a wide range of vehicles, including various Buick, Cadillac, Chevrolet, Ford, Lincoln, Mercury, GMC, Isuzu, Jaguar, Mazda, Oldsmobile, Pontiac, Saturn, and select marine applications such as Crusader and Indmar. Whether you're upgrading from OEM nickel alloy plugs or seeking enhanced performance for modified applications, these plugs deliver consistent ignition and improved fuel economy.
This set of four NGK IX Iridium Spark Plugs is recommended for use in high-performance or modified engines, providing a significant upgrade over standard plugs. Their compact size and robust construction make installation straightforward, and their anti-fouling properties help maintain optimal engine performance over time. Perfect for enthusiasts looking to optimize engine response, fuel efficiency, and ignition reliability, these plugs are engineered to meet the rigorous demands of modern automotive engines and marine applications alike.

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