HKS Super Fire Racing Spark Plug - M45HL (50003-M45HL)

The HKS M45HL is the ultimate high-performance ignition upgrade for modern "Long Reach" cylinder heads. Engineered with an NGK Heat Range 9 equivalent, this "colder" plug is designed specifically for engines running high boost, aggressive ECU tunes, or frequent track use where managing cylinder heat is critical to preventing engine knock and pre-ignition.

Whether you are pushing the limits of your GR Yaris, Toyota 86, or Nissan R35 GT-R, the HKS M-Series ensures a stable, powerful spark under the most extreme Australian racing conditions.

Why Upgrade to M45HL?

• Colder Heat Range (NGK #9): Ideal for modified engines that generate significantly more heat than stock, protecting your engine from catastrophic detonation.

• 0.6mm Iridium Alloy Center Electrode: Requires less voltage to jump the gap, resulting in better ignition performance, sharper throttle response, and more reliable cold starts.

• Platinum Ground Electrode: Features a square platinum chip for superior durability, ensuring your spark gap remains consistent even under high-load circuit driving.

• Anti-Vibration Design: The shortened outer electrode (Anti-Vibration type) is specifically engineered to withstand the high-frequency vibrations found in high-RPM performance engines.

• Thermal Edge & Spark Support: Features HKS’s signature ceramic insulator design that helps discharge carbon buildup during idling, keeping the plug clean even in stop-start traffic.

Technical Specifications

Popular Vehicle Fitment (Australia)

The M45HL is the performance choice for:

• Toyota: GR Yaris (G16E-GTS), GR Corolla, 86 / GR86 (FA20 / FA24)

• Nissan: GT-R (R35 - VR38DETT), 370Z (VQ37HR), Skyline V36

• Subaru: BRZ (FA20 / FA24), WRX (2015+ FA20DIT / VAG)

• Mazda: MX-5 ND (SkyActiv), Mazda 3/6 (SkyActiv-G)

Important: These plugs are sold individually. For a 4-cylinder engine (86/BRZ/Yaris), please order Quantity: 4. For a 6-cylinder engine (GT-R/370Z), please order Quantity: 6.