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• Original Equipment (OE) form, fit and function five-year limited warranty
• Multi-rib ceramic insulator to help prevent misfires
• V-trimmed platinum sidewire electrode technology resists wear

• More focused ignition for better flame kernel growth and faster fuel combustion for better engine performance
• Multi-rib ceramic insulator to help prevent misfires
• Iridium-enhanced 6mm center finewire electrode for improved ignitability, durability and wear resistance

• Meets or Exceeds Original Equipment Design
• Increased Terminal Retention and Strength Properties
• High Temperature, Pre-Greased Silicone Boots

• Multi-rib ceramic insulator to help prevent misfires
• Iridium-enhanced 6mm center finewire electrode for improved ignitability, durability and wear resistance
• More focused ignition for better flame kernel growth and faster fuel combustion for better engine performance

• Near elimination of performance inhibiting carbon deposits, dramatically longer plug life and a 5-year/100,000 mile limited warranty
• Significant potential power increase: > 6% to 12% (depending on engine class)
• DiamondFire electrode technology that creates a superior spark and resulting flame front extending further into the cylinder, producing more localized pressure