HKS Super Fire Racing Spark Plug - M45iL (50003-M45iL)

Protect your engine under high load with the HKS M45iL Super Fire Racing Spark Plug. This premium ISO Long Reach performance plug features an NGK Heat Range 9 equivalent, making it the definitive "colder" choice for heavily tuned or high-boost turbocharged engines.

By dissipating heat faster than standard factory units, the M45iL prevents pre-ignition and engine knock (detonation), ensuring your engine remains safe and reliable during track sessions or spirited driving.

Key Performance Benefits

• Cold Heat Range (NGK #9): Essential for modified vehicles (Stage 2+) running increased boost, upgraded turbos, or aggressive timing.

• 0.6mm Iridium Alloy Center Electrode: Minimizes voltage requirements for a stronger, more efficient spark, resulting in crisper throttle response and improved combustion.

• Platinum Ground Electrode: Features a square platinum chip for extreme durability, maintaining a precise spark gap under high cylinder pressures.

• Long Reach Design (26.5mm): Specifically engineered for cylinder heads that require an extended thread reach to position the spark perfectly within the combustion chamber.

• Thermal Edge Technology: Signature HKS ceramic insulator design discharges to help burn off carbon deposits, virtually eliminating the risk of fouling during idling.

Technical Specifications

Vehicle Fitment Guide (Australia)

The HKS M45iL is a top-tier performance upgrade for:

• Mitsubishi: Lancer Evolution IX (4G63 MIVEC)

• Subaru: WRX & STI (EJ20/EJ25 Long Reach heads — 2001+), Liberty GT, Forester XT

• Kia: Stinger (3.3L V6 Twin Turbo — Check tuner recommendations for colder heat ranges)

• Nissan: Select VQ-series engines requiring long reach ISO plugs (350Z/V35)

• BMW: Early N-series and select M54 performance builds

Purchasing Note: Spark plugs are sold individually in Australia. For a Mitsubishi Evolution IX or Subaru WRX/STI, please order Quantity: 4. For a Kia Stinger V6, please order Quantity: 6.