NGK R7438-9 Stage 3 Plus Racing Spark Plug (Set of 4)



Recommended on those vehicles which are Stage 3 tuned and above. NGK Racing Series Plugs are Engineered to Withstand the Harshest Engine Conditions.


  • Fine Wire Centre 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 Flash-over
  • Pure Alumina Silicate Ceramic Insulator, Provides Superior Strength and Better Heat Transfer
  • Copper Core Aids in Heat Removal
  • Triple Seals Prevent Leakage