Denso Iridium Spark Plug VKH22 5619 High-Performance Ignition Upgrade Choice

Denso VKH22 5619 iridium spark plug used to improve ignition efficiency and ensure stable combustion. OEM number not listed; compatible with Denso-brand models produced after 2000. Installation difficulty: medium; note threading length 26.5 mm and M14x1.25 thread; tighten strictly to standard torque to avoid engine block damage.