Fitment: Ideal for 2004 - 2007 Subaru STI and 2005 - 2009 Subaru Legacy GT. Features: Sold in a set of 4. Engineered for original equipment applications. Trivalent metal plating resists corrosion and seizing. Corrugated ribs stop flashover. The pure alumina silicate ceramic insulator is strong and transfers heat well. A copper core helps remove heat. Triple seals prevent leakage. It lasts up to 100k miles and comes with a 60 - day manufacturer warranty. Shell Details: 14mm thread diameter, 1.25mm thread pitch, flat seat, 26.5mm reach, 5/8' (16mm) wrench diameter, solid terminal type, and 0.8mm gap. Center Electrode: Iridium tip with a copper core. Ground Electrode: Nickel material, standard type, taper - cut shape. Specifications: Has a 5k Ohm resistor, manufacturer heat range of 6. Torque specs are 18 - 25.3 lb. ft. for cast iron and 18 - 21.6 lb. ft. for aluminum. NGK Laser Iridium spark plugs deliver great performance and long life, with stable idle, anti - fouling, better fuel efficiency, and lower emissions. Import Image Racing is an authorized NGK dealer, ensuring authentic products and warranty coverage.
Using these NGK spark plugs is straightforward. First, make sure your engine is cool. Remove the old spark plugs carefully using the right tools. Check the gap of the new spark plugs to ensure it's correct. Then, gently thread the new spark plugs into the engine. Tighten them according to the torque specs: 18 - 25.3 lb. ft. if your engine is cast iron and 18 - 21.6 lb. ft. if it's aluminum. Don't overtighten as it can damage the spark plugs or the engine. As for maintenance, these spark plugs are designed to last up to 100k miles. However, it's a good idea to check them regularly, especially if you notice any changes in your engine's performance like rough idling or reduced fuel efficiency. If you see excessive fouling or wear, it might be time to replace them. Keep in mind that these products come with a 60 - day manufacturer warranty, so if you have any issues within this period, contact Import Image Racing for assistance.
