NGK 127 Laser Iridium Spark Plug SIFR6A11 Heat Range 6 M14-1.25

The NGK 127 Laser Iridium spark plug (SIFR6A11) is a high-ignitability iridium/platinum spark plug built to OE standards. It is a long-life replacement ignition plug for engines that use OE iridium alloy plugs. NGK is a leading OE spark plug supplier, and this plug is made for reliable starts and consistent performance.

Key Features:

• Iridium center electrode: The iridium tip is about six times harder than platinum. It suits modern high-efficiency engines.
• Projected square platinum electrode (PSPE) ground electrode: This design gives high ignitability and even wear in distributorless ignition systems.
• Copper core: A 98% pure copper core helps dissipate heat and prevents overheating.
• Ceramic insulator: High-grade pure alumina ceramic.
• Trivalent metal plating: Resists corrosion and seizing for easier installation and removal.
• Resistor design: Approximately 5,000 ohm resistance.

Specifications:

• NGK plug number: SIFR6A11 (stock number 127)
• Heat range: 6
• Thread size: M14-1.25 (14 mm diameter)
• Thread reach: 0.750 in (19 mm)
• Hex size: 5/8 in (16 mm)
• Pre-set gap: 0.044 in (1.1 mm)
• Seat type: Flat, with gasket (crush washer)
• Terminal: Non-removable nut
• Insulator height: 1.99 in (50.5 mm)
• Center electrode: Iridium tip, copper core
• Ground electrode: Platinum tip, nickel core

Also listed as an OE cross-reference for Subaru part numbers 22401AA730 and 22401AA731. Use the pre-set gap as supplied unless the engine manufacturer specifies otherwise.