NGK Spark Plug CR7HIX 7544

The NGK CR7HIX spark plug (Manufacturer Part Number 7544, SKU 37-CR7HIX) is a performance-grade Iridium IX plug designed to deliver enhanced durability and stable ignition for high-tech, high-performance engines, with a copper core, iridium fine-wire electrode, and advanced coatings to resist corrosion and flashover.

Features

• Fine-wire iridium center electrode for consistent spark and high durability
• Iridium alloy electrode with a very high melting point suitable for modern high-efficiency engines
• Trivalent metal plating for enhanced anti-corrosion and anti-seizing characteristics
• Corrugated ribs on the insulator to prevent flashover
• Pure alumina silicate ceramic insulator providing superior strength and heat transfer
• Copper core for effective heat dissipation
• Triple seals to prevent leakage
• Resistor type to suppress interference

Specifications

• Hex size: 5/8 inch (16mm)
• Thread diameter: 10mm
• Thread reach: 1/2 inch (12.7mm)
• Projected insulator type
• Resistor value: approximately 5kO
• Heat range: 7
• Gap size: 0.028in (0.7mm)
• Center electrode tip: fine iridium, 0.6mm diameter
• Ground electrode: single tapered cut nickel
• Seat type: gasket (flat)

Vehicle Fitments

• 1959–1965 Honda C100 Super Cub 50
• 1960–1961 Honda C102 Super Cub
• 1962–1963 Honda C105T Trail
• 1960–1962 Honda C110 Super Sports Cub 50
• 1980–1983 Honda C70 Passport
• 1964–1969 Honda CA100 (including CA100T Trail)
• 1964–1969 Honda CA102
• 1962–1969 Honda CA110 Sport
• 1997–2007 Honda CH80 Elite
• 1970–1972 Honda CL70K Scrambler
• 1978–1979 Honda CM185T Twinstar