Denso Iridium Plugs for EJ25 (OEM Temp & 1 step colder)
Denso Iridium Plugs for STI, 05 Legacy GT, and Forester XT (OEM Temp & 1 step colder)
The Denso Iridium spark plug is a new generation of high-performance spark plug that uses the worldÃ¢â‚¬â„¢s smallest Iridium electrode that is a mere 0.4 mm in diameter. The smaller electrode is able to concentrate the electric potential at the electrode resulting in a stronger electric field. The stronger the electric field, the less voltage is required to create a spark. The result is good combustion for all types of driving, the engine starts easily, and acceleration improves.
These plugs are available in the OEM heat range, and one step colder. One step colder than stock are better able to dissipate heat, and are perfectly suited to a modified engine.
The Denso Part Number for these Plugs are: IKH20 & IKH22
This is for a set of 4 spark plugs
WARNING: Operating, servicing and maintaining a passenger vehicle or off-road vehicle can expose you to chemicals including engine exhaust, carbon monoxide, phthalates, and lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. To minimize exposure, avoid breathing exhaust, do not idle the engine except as necessary, service your vehicle in a well-ventilated area and wear gloves or wash your hands frequently when servicing your vehicle. For more information go to https://www.P65Warnings.ca.gov/passenger-vehicle.
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