HKS MR45XLZ Spark Plugs Set Fits Hyundai N Vehicles *FREE SHIPPING*

IN STOCK Sold as a set of four The HKS Super Fire Racing MR45XLZ is a premium, long reach M12 spark plug engineered for high-boost, tuned, Gasoline Direct Injection (GDI) engines. They feature a No. 9 heat range (NGK equivalent) and advanced materials to ensure reliable ignition and consistent engine performance These plugs come pre-gapped to .030" from HKS which is suitable for use out of the box but we suggest closing the gap down to .028 for mildly modified N's to .022 for high boost/high power applications Key Features & Technology Ruthenium Alloy Center Electrode: Combines exceptional durability with a reduced voltage requirement, which leads to improved ignition performance and better fuel burn. Platinum Square Chip Outer Electrode: Grooved and shaped to improve ignitability, combustion speed, and to reduce overall weight, providing anti-vibration durability. Protruding Electrode Design: Specially designed to aid in combustion swirl and efficiently manage the high fuel pressures commonly found in GDI engines. Thermal Edge & Plating: Features advanced heat transfer/insulation coatings and anti-corrosion finishes to prevent carbon buildup and resist extreme racing environments. Brass Terminal: Ensures a firm, secure fitment to the ignition coil-pack or plug wire.