DENSO – SET OF 4 HIGH PERFORMANCE SPARK PLUG IKH27

Description

Specifications of the Denso Iridium IKH27 spark plug (alternative to NGK Racing R7437-9)

Whatever your use or engine configuration, the correct choice of spark plug is very important. Iridium is a very heavy and dense metal, ensuring that Denso spark plugs have a longer life than OEM ones, withstanding more than 100,000 km in standard use.

Which heat range to choose?

If the letters (for example IKH) indicate the shape of the spark plug and the thread size, the numbers (20 to 27) indicate the thermal range, essentially indicating how well the spark plug can perform under intense conditions. The higher the number, the ""colder"" the spark plug will be, and the more suitable for elaborate engines and sporting use. A cold spark plug is designed to operate at above-average temperatures and disperse heat within the cylinders, improving combustion, performance and engine reliability, while reducing the risk of detonation.

However, make sure you only fit cold spark plugs if your car requires them, otherwise you may experience problems such as difficult cold starts and rough idling. Also, do not install cold spark plugs if your engine runs on E85 fuel. In short:

• IKH20: standard grade, for series engines or for use with E85 ethanol
• IKH22: one degree colder than standard, for slightly tuned or sports engines, used both on the road and on the track
• IKH24: two degrees cooler than the standard, for elaborate and powerful engines used mainly on the track
• IKH27: three degrees cooler than standard, for high-power, heavily modified engines used in intense conditions