Description
We offer a full selection of HKS Super Fire Racing family of spark plugs optimized for race and tuning applications, featuring reinforced ignition capabilities, durability and anti-insulation. 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.
Heat ranges are designed to withstand high temperatures and pressures under demanding race conditions.
The HKS M40-X spark plug features M12 x 19 thread and a wrench size 16 mm / 5/8″.
It is designed for small compact cars. Applications can include:
- Some Mitsubishi (e.g., i, Minica, Pajero Mini, Toppo BJ, Town Box, Delica D:2)
- Some Suzuki (e.g., Jimny, Swift, Alto, Carry, Every, Cappuccino, Wagon R, MR Wagon, Kei)
- Some Daihatsu (e.g., Boon, Coo, Mira, Move, Terios)
- Some Mazda (e.g., AZ Wagon, AZ-1, AZ-Offroad, Carol, Scrum, Spiano)
- Some Nissan (e.g., Moco, Ottis)
- Some Subaru (e.g., Dex, Pleo, Vivio)
- Certain Audi (e.g., A3, A4, TT Quattro) and Volkswagen (e.g., Eos, Golf MK4) models.
- Certain BMW models (e.g., M3, Z3).
The heat range is 40 (NGK 8 equivalent).
The chart below illustrates the respective Denso and NGK heat range indexes.
