HKS Super Fire Racing Spark Plugs MR Series (6 pieces) – Toyota GR Supra B58 3.0 (2020+)

Item number: MR40XLB / MR45XLB

Maximum ignition performance for your Toyota GR Supra B58!

The HKS Super Fire Racing Spark Plugs MR Series are the absolute top of the line performance spark plugs, designed for demanding high-performance engines such as those of the Toyota GR Supra 3.0 B58 (2020+) . These spark plugs offer stable ignition, excellent durability, and a reliable spark , even under extreme boost pressures and high temperatures — exactly what you need for Stage 1, 2, or even 3 tuning.

This set contains 6 spark plugs and is available in two heat ranges:

• MR40XLB (Heat Level 8) – Standard recommended for Stage 1 and Stage 2 setups

• MR45XLB (Heat Level 9) – For heavier tuning, high boost and track use

Key Features of the HKS Super Fire Racing MR Series

• ✅ Ruthenium Center Electrode – for maximum spark power and minimal wear

• ✅ Heat level 8 or 9 – tailored to your specific tuning level

• ✅ Optimal ignition stability at high compression and turbo pressure

• ✅ Better throttle response and more efficient combustion

• ✅ Developed for high-performance engines such as the Toyota B58

Why choose HKS Super Fire Racing Spark Plugs?

🔹 Designed for tuned engines – these spark plugs stay stable where standard NGK or Denso spark plugs fail.
🔹 Longer life and better ignition – thanks to high-quality materials and Japanese precision production.
🔹 Improved cold starts and smoother engine running – noticeable difference, even in everyday use.
🔹 Perfect match with HKS tuning parts such as exhaust systems, intake kits and ECU upgrades.

Application

• Toyota GR Supra A90 / A91 3.0 B58 (2020+)

• Also suitable for BMW models with the same B58 engine (such as M140i, M240i, M340i, Z4 M40i)

• Ideal for Stage 1 to Stage 3 tuning

Heat level advice:

• 🔸 MR40XLB (8) – Suitable for standard to medium tuned vehicles (Stage 1–2)

• 🔸 MR45XLB (9) – For heavily tuned or track-oriented engines with high thermal loads

Summary

The HKS Super Fire Racing MR Series spark plugs are the benchmark for anyone who wants absolute reliability and maximum performance from their Toyota GR Supra B58 . Whether you drive daily or push your engine to the limit on the racetrack, these spark plugs deliver consistent spark power, stability, and durability.

✔ Stable ignition up to the highest revs
✔ Choice of heat level 8 or 9
✔ Perfect upgrade for all tuned GR Supras