NGK Iridium IX Spark Plug Box of 4 (XR5IX)

The improved throttle response, superior anti-fouling and high-ignitability makes Iridium IX® the ideal choice for any performance enthusiast. Iridium's high melting point is perfectly suited to today's high-temperature engines, delivering outstanding acceleration, fuel efficiency and durability.

Additional Information

NGK Iridium IX spark plugs are specifically designed for the performance enthusiast. Iridium IX provides outstanding acceleration, high fuel efficiency and durability.

Application Summary

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

Part Type

Spark Plug

Product Overview

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.

These additional application notes are supplied by the manufacturer and collated from multiple year ranges. Not all of these notes may apply to every year or every variant. Please contact a StreetFX agent for clarification if required.

• Fine iridium tip ensures durable and consistent spark
• Outstanding acceleration, high fuel efficiency and durability
• 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

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Product Details

Reference Information