Spark Plug Set: Denso: Gen1

This replacement set of 4 spark plugs are made by Denso to strict OE standards.

K20TXR   5063

Denso Spark Plug Denso's standard plugs provides a Copper core for better thermal conductivity.
Machine rolled threads to reduce cross-threading and seizing . The plug insulator is constructed of purified alumina powder for extreme stress with 5 ribs to prevent flashover.

Features and Benefits:
- Machine Rolled Threads Prevent Seizing or Cross Threading During Installation and Removal
- 100% Pre-Fired to Assure the Highest Quality Possible
- Purified Alumina Powder Insulator Provides Exceptional Strength and Thermal Conductivity
- Five Rib Insulator Prevents Flashover
- Copper-Glass Seal Bonds Center Electrode and Insulator for a Gas-Tight Seal

These are NOT ideal for the John Cooper Works models.