NGK 91970 ILNAR8B7G Laser Iridium Spark Plug

The NGK 91970 Laser Iridium Spark Plug (ILNAR8B7G) delivers premium ignition performance for modern high-tech engines. Designed specifically for performance enthusiasts and OE applications, this spark plug combines advanced iridium technology with precision laser-welded construction for exceptional durability and long service life.

Advanced Construction Features:

• Laser-welded iridium center electrode tip provides superior ignitability and consistent spark performance
• Fine wire 0.6mm iridium center electrode is six times harder than platinum for exceptional wear resistance
• Platinum disc welded to ground electrode ensures slow wear rate and even electrode wear in distributorless ignition systems
• Pure alumina silicate ceramic insulator delivers superior dielectric strength and heat transfer
• 98% pure copper core aids in rapid heat removal and dissipation
• Trivalent metal plating provides superior anti-corrosion and anti-seizing properties
• Triple gasket seals prevent combustion gas leakage
• Corrugated ribs on insulator prevent flashover and misfiring

Performance Benefits:

• Improved fuel efficiency and lower emissions
• Faster starts and quicker acceleration
• Stable idle and superior anti-fouling performance
• Consistent performance at high RPM and under boost conditions
• Extended service life of 80,000 to 100,000 miles

Technical Specifications:

• Thread Size: 12mm x 1.25mm pitch
• Thread Reach: 25mm (1 inch)
• Seat Type: Tapered
• Hex Size: 9/16 inch (14mm)
• Gap: 0.028 inch (0.7mm)
• Heat Range: 8
• Terminal Type: Solid
• Resistor: 5 kOhm interference suppression
• Electrode Configuration: Extended projection

OEM Cross-Reference Numbers: General Motors 12683541, General Motors 55490097

This spark plug is engineered to meet or exceed OE specifications and is ideal for turbocharged and direct-injection engines that demand reliable, high-performance ignition components. Sold individually.