HKS 50003-M45HL Super Fire Racing Spark Plug #9 - Nissan GT-R R35 / Subaru BRZ / BMW S63 / AMG M156 6.3 - 1 Piece

HKS 50003-M45HL Super Fire Racing Spark Plug #9 – Nissan GT‑R R35 / Subaru BRZ / BMW S63 / AMG M156 6.3

The HKS M45HL Super Fire Racing spark plug is a long‑reach, iridium‑tipped racing plug with a #9 heat range designed for high‑performance and turbocharged engines. In engines with high boost, high compression and high RPM, it produces a stronger, more stable spark for improved combustion efficiency and engine safety.

✅ #9 heat range: ideal for high temperature and boost levels

✅ HL type construction: long plug length with protruding electrode

✅ Fine iridium electrode delivers a strong spark even at low voltage

✅ Low misfire risk and high ignition stability

✅ Far higher heat and pressure tolerance than OEM plugs

Stock plugs are susceptible to weak spark and thermal breakdown in high‑performance engines. HKS Super Fire Racing plugs are developed specifically for these engines and deliver greater safety and efficiency from the ignition system.

Compatible Vehicles

- Nissan GT‑R R35 VR38DETT

- Subaru BRZ 2.0 / 2.4 (for high‑performance applications)

- BMW M5 / M6 / X5M / X6M S63 engine (4.4L TwinTurbo V8)

- Mercedes‑Benz AMG M156 6.3L V8 (C63 / E63 / CLS63 / S63)

Installation

Direct replacement once the OEM plugs are removed. Tighten to the manufacturer’s torque values with a torque wrench. Check compatibility with ignition coils and plug wires.

Note

#9 heat range is very cold and recommended only for high‑performance, tuned or high‑boost engines. Using them on stock engines can reduce efficiency. Verify your engine configuration and heat range requirements before ordering.