NGK 91568 Laser Iridium Spark Plug SILZKR6D8E, Heat Range 6, 12mm

The NGK 91568 Laser Iridium spark plug (NGK part number SILZKR6D8E) is an OE-engineered iridium spark plug built for long service life and dependable ignition. NGK Laser Iridium plugs are often specified as original equipment. They pair a fine-wire iridium center electrode with a platinum ground electrode for strong ignitability and long wear. It is a direct replacement for OE number 18846-08060 (Hyundai 1884608060).

Key Features:

• Fine-wire iridium center electrode, laser-welded for strong ignitability and long wear
• Iridium is about six times harder than platinum, which helps extend service life
• Square platinum pad on the ground electrode for even wear
• High-grade alumina ceramic insulator with a copper-core center electrode for heat dissipation and reliable starts
• Built-in 10k ohm resistor to help suppress radio-frequency interference
• Trivalent metal plating for corrosion resistance and easier removal

Specifications:

• NGK part number: 91568 (SILZKR6D8E)
• Thread size: M12 x 1.25 mm
• Reach: 26.5 mm (1.04 in)
• Hex size: 5/8 in (16 mm)
• Heat range: 6
• Pre-set gap: 0.031 in (0.8 mm)
• Seat type: Gasket (crush washer)
• Terminal: Solid, non-removable
• Resistor: Yes, 10k ohm
• Torque: 10.8-14.5 lb-ft (aluminum heads); 10.8-18 lb-ft (cast iron heads)

NGK Laser Iridium plugs are rated for roughly 80,000 to 100,000 miles. They suit drivers who want OE-quality ignition performance with long replacement intervals.