Description
We have the full selection of HKS Super Fire Racing spark plugs for race and tuning applications, featuring reinforced ignition capabilities, durability and anti-insulation. The heat ranges are designed to withstand high temperatures and pressures under racing conditions.
The thermal edge of the ceramic insulator discharges to help decrease carbon deposits under long idling.
Their iridium alloy center electrode reduces voltage requirements and improves ignition performance and durability.
The HKS M-XL series spark plugs feature a narrow Long Reach M12 x 26,5 thread and a plug wrench size 16 mm / 5/8″
Notable engine applications include:
- Mitsubishi Lancer Evo X (4B11T engine): Both M40XL and M45XL are popular choices for this engine, depending on the level of tune
- Mercedes-Benz AMG 5.5L Bi-Turbo engines
- Certain Mini Cooper models (especially with the N12/N14/N18 engines, although specific fitment varies by year and engine code)
- Some Subaru and Honda applications, particularly those requiring a 12mm thread with a long reach.
- Certain Kia/Hyundai platforms (e.g., some 2.0T, 2.5T, and 1.6T engines).
Two heat ranges are offered: 40 (NGK 8) and 45 (NGK 9).
The chart below illustrates the respective Denso and NGK heat range indexes.
Choose the best option from the drop down menu.
