
Ik16#4 5303 Iridium Power Candle Ik16 5303 Spark Plugs. Iridium Center Electrode: Delivers maximum service life compared to standard copper plugs. 4X Longer Service Life: Lasts four times longer than standard copper spark plugs. 95% Pure Alumina Insulator: Highly resistant to heat shock with great mechanical and electric features. Nickel-Plated Housing: Prevents oxidation and corrosion with heat-crimping for gas-tight fit. V-Trimmed Ground Electrode: Promotes sharper spark focus for greater excitability. Multi-Rib Insulator Design: Eliminates flashover for reliable sealing and conductivity. Copper Core Electrode: Prevents oxidation and ensures good electric and heat conductivity. OEM/ODM Acceptance: Customization available for thread size and packaging requirements.