These NGK (BKR7EIX) iridium spark plugs are a perfect fit for 2002 - 2005 Subaru WRX models. They come as a set of 4. The trivalent metal plating offers excellent anti - corrosion and anti - seizing features. The corrugated ribs stop flashover. The pure alumina silicate ceramic insulator provides great strength and efficient heat transfer. The copper core helps remove heat effectively. With triple seals, leakage is prevented. These plugs can last up to 50k miles and come with a 60 - day manufacturer warranty. The spark plug has a 14mm thread diameter, 1.25mm thread pitch, a flat seat type, 19mm reach, 16mm wrench diameter, a solid terminal type, and a 0.8mm gap. The center electrode tip is made of iridium with a copper core, while the ground electrode is nickel, standard type with a taper cut shape. It has a 5k Ohm resistor and a manufacturer heat range of 7. Torque specs are 18 - 25.3 lb. ft. for cast iron and 18 - 21.6 lb. ft. for aluminum. NGK iridium spark plugs are more durable than platinum ones, with a higher melting point, better anti - oxidation and anti - erosion for the center electrode, improved ignition, superior anti - fouling, and lower required voltage. One step colder plugs are great for heavily modified cars, making your Turbo Subaru run smoother and more efficiently. Iridium plugs can use larger gap settings with less voltage, but re - gapping them is at your own risk as slide - type plug gappers can damage the iridium tip. Import Image Racing is an authorized NGK dealer, ensuring authentic products covered by the manufacturer warranty.
Using these NGK iridium spark plugs in your 2002 - 2005 Subaru WRX is straightforward. First, make sure your car's engine is cool before you start the replacement. Remove the old spark plugs carefully and then install these new ones. Tighten them according to the torque specs: 18 - 25.3 lb. ft. if your engine has a cast - iron block, and 18 - 21.6 lb. ft. if it's aluminum. One important thing to note is that these iridium spark plugs are quite fragile at the tip. Avoid using slide - type plug gappers to re - gap them as it can damage the iridium tip. Only re - gap if you really need to correct misfiring or tune for optimal spark, and do it at your own risk. For maintenance, these plugs are designed to last up to 50k miles. But it's a good idea to check them regularly, especially if you notice any changes in your car's performance, like rough idling or reduced power. If you have any questions or concerns, you can always reach out to us as we're an authorized NGK dealer and can offer support covered by the manufacturer's 60 - day warranty.
