NGK Laser Iridium Spark Plugs Subaru WRX 2008-2014 / Forester XT 2009-2013 / Legacy GT 2005-2009 (SILFR6A) - Set of 4

NGK Laser Iridium High Ignitability spark plugs offer the best combination of performance and longevity. Engineered specifically for OE applications, Laser Iridium High Ignitability spark plugs are tested to the highest standards to ensure quality and durability. Iridium tipped center electrode provides durability six times harder than platinum. NGKs high grade pure alumina ceramic and 98 percent pure copper core prevents the spark plug from overheating while providing reliable starts. Laser Iridium High Ignitability spark plugs feature raised platinum pad or platinum fine wire tip on the ground electrode for even wear in distributorless ignition systems and improved spark performance.

ACTUAL OE or EQUIVALENT HIGH IGNITABILITY DESIGN: SPE tip & iridium alloy center electrode produce the most advanced OE spark plug technology

IRIDIUM ALLOY CENTER ELECTRODE: Iridium's density (6x that of platinum) and extremely high melting point is perfect for modern high efficiency engines

SPE DESIGN: Square platinum electrode shape of the ground electrode provides the best ignitability and service life for high heat engines

SOLID COPPER CORE: 98% pure copper core offers superior heat dissipation, conductivity and ultra wide heat ranges

TRIVALENT METAL PLATING: Delivers superior anti-corrosion and anti-seizing properties, ensuring ease of installation and removal

RECOMMENDED USAGE: Best for vehicles with OE SPE iridium alloy plugs

Attributes

• Center Electrode Core Material: Copper
• Center Electrode Tip Material: Iridium
• Electrical Terminal Type: Non-Removable Nut
• Ground Configuration: Standard
• Ground Electrode Core Material: Nickel
• Ground Electrode Tip Design: Square Platinum Electrode - High Ignitability
  
• Hex Size: 5/8 in
• Insulator Height: 50.50 mm
• Manufacturer Heat Range: 6
• Pre-Gap Size: .032 in
• Reach: 26.5 mm
• Resistance: 5000 Ohms
• Seat Type: Flat
• Thread Diameter: 14.00 mm

Fitment

• 2009-2013 Subaru Forester
• 2008-2014 Subaru WRX
• 2013-2018 Subaru STI
• 2005-2009 Legacy GT
• 2005-2009 Subaru Outback
• 2008-2009 Subaru Tribeca