NGK CR7HIX Iridium Spark Plugs Pack of 4 Rieju RS-2 125 AC 2006     NGK CR7HIX (7544) Iridium Spark Plugs Pack of 4. NGK - the world's No.1 spark plug - brings you the Iridium IX designed specifically with the performance enthusiast in mind. Iridium IX offers extreme ignitability, improved throttle response and superior anti fouling. Features: Fine Wire Center Electrode Ensures High Durability and a Consistently Stable Spark Iridium Alloy has an Extremely High Melting Point, Perfect for Today's High-Tech, High Performance Engines Trivalent Metal Plating Provides Superior Anti-Corrosion and Anti-Seizing Properties Corrugated Ribs Prevent Flashover Pure Alumina Silicate Ceramic Insulator, Provides Superior Strength and Better Heat Transfer Copper Core Aids in Heat Removal Triple Seals Prevent Leakage               Check out our store for more NGK spark plugs! We also stock this spark plug individually.