Denso 3381 U-Groove Spark Plug Stock Heat Subaru 2.5L Turbo

Description:
- U-Groove Ground Electrode Promotes Ignitability and Decreases Quenching
- Fully Projected Insulator Reduces Carbon Fouling
- 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

Applications:
All 2.5 Subaru Liter Turbos