NGK Racing Spark Plug Box of 4 (UR4IX)

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. CHECKER 1978-70; CHEV 1993-70; CHR/DOD/PLY 1987-74; FORD/LIN/MERC 1996-69; GM 1993-67; JEEP 1971-69, I/O - 2000-99 KODIAK, 1998-78 OMC, PE ENGINES - HON, KOHLER, MITS, SUBARU-ROBIN, OPE - VARIOUS

• RECOMMENDED USAGE: Modified or high performance applications, or as an upgrade to OE nickel alloy spark plugs
• Pure alumina silicate ceramic insulator provides superior strength and better heat transfer
• Special insulator nose configurations improve throttle response
• Corrugated ribs prevent flashover
• Copper core aids in heat removal
• Triple seals prevent leakage

Designed for high-performance and enthusiast applications, the NGK Iridium IX Racing Spark Plugs (Part Number NGK7401) deliver exceptional acceleration, fuel efficiency, and durability. These plugs feature a tapered cut ground electrode that enhances starting, idling, and throttle response, making them ideal for modified engines or those seeking an upgrade from standard nickel alloy spark plugs. The iridium fine wire center electrode is six times harder than platinum, providing increased longevity and consistent performance under demanding conditions. With an extremely high melting point thanks to the iridium alloy, these spark plugs are well-suited for today's advanced engines, ensuring reliable spark generation even in high-stress scenarios. Each unit incorporates a pure alumina silicate ceramic insulator that offers superior heat transfer and strength, coupled with specially designed insulator noses that further improve throttle response. Corrugated ribs prevent flashover, while a copper core aids in efficient heat removal. Triple seals are incorporated to prevent leakage, ensuring long-lasting performance and minimal maintenance. Compatible with a variety of vehicle makes including Chevrolet, Ford, GM, Jeep, and Subaru, as well as marine and small engine applications, these spark plugs are an excellent choice for those looking to maximize engine responsiveness and efficiency. Whether for racing, modified setups, or high-performance upgrades, NGK Iridium IX plugs provide the reliability and performance that enthusiasts demand, making them a valuable addition to your vehicle's ignition system.

Features:

• Recommended Usage: Designed for modified or high-performance engines, ideal as an upgrade from OE nickel alloy spark plugs

• Insulator: Pure alumina silicate ceramic provides superior strength and heat transfer

• Electrode Design: Tapered cut ground electrode improves starting, idling, and throttle response

• Durability: Iridium fine wire center electrode is six times harder than platinum for extended lifespan

• Heat Management: Copper core aids in efficient heat removal

• Sealing: Triple seals prevent leakage and ensure long-lasting performance

• Construction: Corrugated ribs prevent flashover, enhancing spark reliability