NGK Iridium IX Spark Plug Box of 4 – Part Number 7355 for High-Performance Vehicles

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 1967-50; CAD 1966-53; CHEV 1970-62; CHRYS 1977-59; DODGE 1979-60; GMC 1968; INTL 1980-61; OLDS 1969-57; PLY 1978-60; PONT 1969-67, I/O - 1990-60 HARDIN, O/B - 1991-74 CLINTON, 1987-69 ESKA, 1984-81 EXPLORER, SEARS, 1981-70 WIZARD

• 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

The NGK Iridium IX Spark Plug (Part Number 7355) is engineered for automotive enthusiasts seeking enhanced engine performance and reliability. Crafted with a fine iridium tip, this spark plug offers outstanding ignitability, ensuring quick starts and smooth acceleration across a variety of high-performance applications. The tapered cut ground electrode further improves starting, idle stability, and throttle response, making it an ideal upgrade for modified or high-performance engines. The iridium alloy's high melting point and durability—six times harder than platinum—provide excellent longevity and consistent performance over time.
Designed with trivalent metal plating, these plugs offer superior corrosion resistance and anti-seize properties, which contribute to easier installation and longer service life. They are particularly suitable for engines requiring precise and reliable spark performance, delivering high fuel efficiency along with outstanding acceleration. The NGK Iridium IX is recommended as an upgrade from OE nickel alloy plugs, providing a significant boost in engine responsiveness and efficiency.
These plugs are compatible with a range of classic and modern vehicles, including the 1967-1970 Chevrolet Camaro, 1962 Chevrolet Corvette, 1969 Pontiac LeMans, 1968 Pontiac GTO, 1970 Chevrolet Nova, and 1966 Chevrolet Impala, among others. Whether you are restoring a vintage muscle car or enhancing a high-performance build, the NGK Iridium IX Spark Plugs offer a reliable solution for improved engine performance and durability.
Each box contains four spark plugs, making them perfect for a complete ignition system upgrade or replacement. Designed for use in modified or high-performance engines, these plugs are not only a direct fit but also deliver the consistent spark quality needed for optimal engine operation and efficiency.

Features:

• Recommended Usage: Suitable for modified, high-performance applications, or as an upgrade to OEM nickel alloy spark plugs

• Trivalent Metal Plating: Provides superior anti-corrosion and anti-seizing properties for longer service life

• Outstanding Acceleration and Fuel Efficiency: Ensures quick starts, smooth throttle response, and improved fuel economy

• Fine Iridium Tip: Ensures durable, consistent sparks for reliable engine performance