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These spark plugs are suitable for use in:

• Hemi 6 215/245/265
  
• Slant 6 198/225
  
• Small Block LA 273/318/340/360
• Small Block Magnum 273/318/340/360

Please note that they feature a smaller hex than factory to ensure easy fitting in all the engine applications.

They are a direct replacement with the exact correct thread type.

NGK's Standard Plugs
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 Flashover
• Pure Alumina Silicate Ceramic Insulator, Provides Superior Strength and Better Heat Transfer
• Copper Core Aids in Heat Removal
• Triple Seals Prevent Leakage