TEMPEST® UREM38E Massive Electrode Aircraft Engine Spark Plug Tempest™ Aviation Spark Plugs • 'Fired in' resistor for stable resistance value and smoother running engine • Zero-leakage seal encloses hot, high pressure combustion gases • Durable nickel finish offers wear and corrosion resistance • Ceramic insulator provides high performance in severe operational conditions • Reduced fouling and enhanced heat range control • High Conductivity Copper Core Center Electrode • Proprietary Glass Center Seal • High Alumina Ceramic Insulator • Nickel Finish • Nickel Ground Electrodes • Vacuum Infused Center Electrode • Hot-Lock Assembly • Harness Wire Contact