NGK 93815 SILZKR6B10E Laser Iridium Spark Plug

The NGK 93815 Laser Iridium spark plug (NGK plug number SILZKR6B10E) is an OE-grade iridium spark plug built for high ignitability and long service life. It has a fine-wire iridium alloy center electrode and a square platinum (SPE) ground electrode. The design suits modern high-efficiency engines and distributorless ignition systems.

Key Features:

• Iridium alloy center electrode: Iridium is about six times harder than platinum and has a very high melting point, so the tip resists wear.
• SPE ground electrode: The square platinum shape improves ignitability and service life in high-heat engines. It also gives even wear in distributorless ignition systems.
• Solid copper core: A 98 percent pure copper core improves heat dissipation and conductivity and gives a wide heat range.
• High-grade ceramic insulator: Pure alumina ceramic helps prevent overheating and supports reliable starts.
• Trivalent metal plating: Resists corrosion and seizing, which makes installation and removal easier.
• Resistor design: Pre-gapped at 1.0 mm (0.040 in).
• Hex size: 5/8 in wrench size.

Cross-references: Autolite XP6203, DENSO 3479, DENSO 5354, DENSO IXUH20I, DENSO ZXU20HCR8.

Engineered for OE applications and tested to NGK's quality standards, this plug is a good choice for vehicles originally equipped with SPE iridium alloy plugs. It works as a direct replacement or as a longevity-focused upgrade, and NGK rates Laser Iridium plugs for long intervals of about 80,000 to 100,000 miles.