HKS GR86 / BRZ M-Series Spark Plug (One Step Colder)

Price is PER Plug, 4 required for full replacement

on FA24

Best paired with the HKS Wrench Set for easier replacement.

Overview

The HKS Super Fire Racing M‑Series spark plug is a high‑performance iridium spark plug designed for tuned or high‑load engines, offering improved durability and ignition performance over many stock plugs.

Key Features & Specs

• Iridium alloy center electrode:

  • Durable and reliable under high combustion loads with a high melting point (~2454 °C).

  • Improves ignition performance and longevity compared to standard plugs.

• Platinum chip outer electrode:

  • Enhances durability and consistent spark gap life.

• Short, anti‑vibration outer electrode:

  • Helps resist mechanical vibration and wear at high RPMs.

• Thermal Edge & Spark Support Gap:

  • Ceramic insulator features to help reduce carbon buildup and maintain combustion efficiency.

Technical Specifications