HKS 50003-MR45HLZ Super Fire Racing

The latest spark plug from HKS Japan with Ruthenium + Platinum material claimed to be 25% more durable than Iridium.

Ignition, durability, insulation, all reinforced.

Improved ignition performance, durability and anti-carbon build-up.

In addition to the features of the proven "SUPER FIRE RACING M series", the center electrode is made of ruthenium alloy to further improve reliability. Added to "SUPER FIRE RACING" as "MR series".

It is a high heat value plug compatible with the M12 long reach size + electrode protruding type spark plug, which is often used in sports vehicles.

Outer Electrode with Platinum Chip -The outer electrode incorporates a square platinum chip which improves durability, and combining with the iridium center electrode boosts ignition performance, and features a shortened tip design and tapered shape while maintaining the necessary space for proper ignition.

Short Type Outer Electrode (Anti-Vibration) -The outer electrode has been shortened and engineered with the ideal shape to decrease weight for resistance against vibration. This anti-vibration design improves longevity of the outer electrode.

Thermal Edge -After long idling or under various combustion conditions, carbon buildup can occur causing misfires.

The thermal edge of the ceramic insulator discharges to help decrease carbon deposits.

Spark Support Gap -Discharge occurs in the spark support gap (space between the tip of insulator and the base of the outer electrode) to help prevent carbon buildup.

Increased Ignition Performance - Decreased voltage requirement strengthens ignition performance under harsh conditions like lean mixture or high boost pressure.

Improved Durability -New material and design improve durability which allows for use under hard combustion conditions like continuous high load during circuit driving or aggressive tuning.

Decreased Carbon Deposits -Thermal edge and spark support gap help prevent carbon buildup for better ignition under various combustion conditions.

Could fit the following (Native heat range): Honda Civic FC 1.5 Turbo, FK2, FK8, CRV Turbo, Accord Turbo

Could fit the following (NON-NATIVE heat range -1 step colder than OEM heat range): **ONLY VIABLE IF VEHICLE IS MODIFIED TO INCREASE HORSEPOWER OR OEM PLUGSHAVE HEAT ISSUES**

Please ensure Spark Plugs will suit your vehicle by ensuring checking the HKS Cross Reference chart available online (do note HKS's guide might differ for vehicles made in different regions), or message us before hand. We will not be responsible for any issues arising from purchasing and installing the wrong plugs.