NGK 7913 SILFR6A Laser Iridium Spark Plug, Pre-Gapped 0.8mm

The NGK 7913 Laser Iridium spark plug (NGK part number SILFR6A) is a high-ignitability iridium spark plug built to original-equipment standards. It has a fine-wire iridium alloy center electrode and a platinum ground electrode. This design gives dependable ignition, a stable idle and a long service life.

Key Features:

• Iridium alloy center electrode: Iridium is about six times harder than platinum and has a very high melting point. This suits modern high-efficiency engines.
• Platinum ground electrode: The platinum tip wears evenly and helps keep spark performance consistent over time.
• Solid copper core: The 98% pure copper core improves heat dissipation and conductivity and gives a wide heat range.
• Trivalent metal plating: The plating resists corrosion and seizing, so the plug is easier to install and remove.
• Alumina silicate ceramic insulator: It gives strong insulation and good heat transfer.
• Triple seals: The seals help prevent combustion leakage.

Specifications:

• NGK part number: 7913 (SILFR6A)
• Pre-set gap: 0.8 mm
• Resistor type: Yes
• Center electrode tip: Iridium
• Wrench size: 5/8 in
• Cross-references: Subaru 22401AA670; DENSO 4506, 4704, IKH20TT, PKH20TT

NGK is a major original-equipment spark plug supplier. The Laser Iridium line is intended for engines that use OE iridium alloy plugs. It is a good choice for a like-for-like replacement or for restoring factory ignition performance.