Ignite peak performance with the HKS M45XL Super Fire Racing Spark Plug. Specifically engineered for modern "Long Reach" cylinder heads, the M45XL is the premier performance upgrade for high-output turbocharged engines like the Hyundai i30N, Mitsubishi Evo X, and Kia Cerato GT.
Featuring an NGK Heat Range 9 equivalent, this "colder" plug is designed to dissipate heat rapidly, protecting your engine from pre-ignition and detonation (knock) under high boost and extreme racing conditions.
Superior Heat Management (NGK #9): Ideal for tuned or remapped vehicles (Stage 1+) where increased combustion temperatures require a colder plug for safety.
0.6mm Iridium Alloy Center Electrode: Drastically lowers the required ignition voltage, providing a stronger, more consistent spark and improved throttle response.
Outer Electrode with Platinum Chip: A square platinum chip improves durability and ensures a stable spark gap even under high-load circuit driving.
Anti-Vibration Short Tip: The outer electrode is shortened and reinforced to withstand high-RPM vibrations, preventing premature electrode failure.
Self-Cleaning Thermal Edge: HKS's signature ceramic design helps discharge carbon deposits, virtually eliminating misfires during extended idling or stop-start traffic.
| Attribute | Detail |
| HKS Part Number | 50003-M45XL |
| Plug Type | XL Type (Long Reach) |
| Heat Range | NGK #9 Equivalent (Cold) |
| Thread Size | $12\text{mm} \times 26.5\text{mm}$ |
| Wrench Size | $16\text{mm}$ |
| Electrode | Iridium Center / Platinum Ground |
The M45XL is the industry standard for:
Hyundai: i30N (2.0L Turbo), Veloster N, Kona N, i30 SR/N-Line (1.6L Turbo)
Kia: Cerato GT, Proceed GT, Stinger 2.0L Turbo (Note: Stinger 3.3L TT usually uses M45iL)
Mitsubishi: Lancer Evolution X (CZ4A - 4B11T)
Suzuki: Swift Sport (ZC33S - K14C Turbo)
Purchasing Note: Spark plugs are sold individually in Australia. For most 4-cylinder engines (i30N/Evo X/Swift), please order Quantity: 4.
$795.00
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