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. FORD 1997-70; GM 1995-71; ISUZU 1994-89; JEEP 1986-84, I/O - 1990-74 BERKELEY, 1977-71 FLAGSHIP, 1990-69 HARDIN, 1997-76 INDMAR, 1985-73 OMC

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 #7177) delivers exceptional ignition performance, fuel efficiency, and durability. These plugs are ideal for modified or high-performance applications, providing outstanding acceleration and smooth throttle response. The fine iridium tip ensures a durable and consistent spark, reducing misfires and improving engine efficiency. The tapered cut ground electrode enhances starting, idling, and overall engine responsiveness, making these spark plugs a reliable upgrade over standard nickel alloy options. The iridium alloy's high melting point and hardness extend the lifespan of the plugs, making them suitable for demanding engine conditions and high-performance use.

Constructed with trivalent metal plating, these plugs offer superior anti-corrosion and anti-seizing properties, ensuring long-term performance and ease of installation. The NGK IX Iridium Spark Plugs are compatible with several vehicle models, including 1991 Isuzu Trooper and 1987 Chevrolet Corvette, making them versatile for a range of high-performance and modified engines. Whether you're upgrading your stock spark plugs or enhancing your vehicle’s acceleration and fuel economy, these plugs are engineered to meet the rigorous demands of performance driving.

Each box contains four NGK IX Iridium Spark Plugs, making them ideal for comprehensive engine tune-ups. With their exceptional durability, anti-fouling properties, and superior ignitability, these plugs help ensure your engine runs smoothly and efficiently. Trust NGK’s reputation for quality and performance to keep your vehicle running at its best under demanding conditions.

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