Spark Plugs-Standard-Short Reach-Projected Tip

It is important that you use a short reach extended tip

NGK's Standard Plugs are Constructed for Longer Life and Optimum Performance.
    Trivalent Metal Plating Provides Superior Anti-Corrosion and Anti-Seizing Properties
    Corrugated Ribs Prevent Flash over
    Pure Alumina Silicate Ceramic Insulator, Provides Superior Strength and Better Heat  Transfer
    Copper Core Aids in Heat Removal
    Triple Seals Prevent Leakage