NGK (SILFR6A) Laser Iridium Spark Plugs (Set of 4) for WRX, STI, Forester XT & Legacy GT | 7913
Video description
Restore reliable ignition performance with the NGK Laser Iridium Spark Plug Set. These genuine NGK SILFR6A Laser Iridium spark plugs are engineered to meet or exceed OEM specifications, delivering exceptional ignitability, long service life, and dependable performance for your Subaru.
Featuring an ultra-durable iridium center electrode, platinum-enhanced ground electrode, and copper core construction, these plugs provide smoother engine operation, consistent spark, and service intervals of up to 100,000 miles under normal driving conditions.
Fitment:
Subaru WRX (2008-2014)
Subaru STI (2013-2018)
Subaru Forester XT (2009-2013)
Subaru Legacy GT (2005-2009)
Subaru Outback (2005-2009)
Subaru Tribeca (2008-2009)
Features:
- Genuine NGK Laser Iridium spark plugs
- Iridium center electrode with copper core
- Platinum pad on ground electrode for extended service life
- Trivalent metal plating resists corrosion and seizing
- Pure alumina silicate ceramic insulator
- Corrugated ribs help prevent flashover
- Triple-seal construction reduces combustion gas leakage
- OEM-quality fit and performance
Specifications:
- Thread Diameter: 14mm
- Thread Pitch: 1.25mm
- Reach: 26.5mm (1.04")
- Hex Size: 5/8" (16mm)
- Gap: 0.031" (0.8mm)
- Heat Range: 6
- Resistor: Yes (5k Ohm)
- Service Life: Up to 100,000 miles
Installation Torque:
Cast Iron Cylinder Head: 18–25.3 lb-ft
Aluminum Cylinder Head: 18–21.6 lb-ft
Authorized NGK DealerImport Image Racing is an authorized NGK dealer, ensuring every spark plug is genuine and backed by the manufacturer's warranty.





