Hyundai Kia Iridium Spark Plug 18844-10060/18844-10080 SILKR6C10E Long-lasting stable combustion

Hyundai/Kia models use SILKR6C10E iridium spark plugs 18844-10060/18844-10080 (SILKR6C10E); iridium electrodes offer far higher heat resistance than original nickel alloy plugs, maintaining a more stable ignition gap under high temperatures and pressures, typically extending service life by 2-3x. OEM numbers correspond to 18844-10060, 18844-10080 and SILKR6C10E; fits modern post-2000 models such as Elantra, Sonata, etc. Core function is to provide continuous stable combustion and reduce misfires, optimizing fuel economy. Replacement difficulty moderate; tighten to 26.5 mm thread length with a torque wrench; cold-start recommended.