Iridium Spark Plug VK20 Compatible with Toyota Prius/Audi etc. Enhanced Ignition Performance

If your vehicle shows idle instability, acceleration surge, cold-start difficulty, or noticeably rising fuel consumption, it is likely due to aged iridium spark plugs VK20. When functioning normally, VK20 precisely ignites the air-fuel mixture to deliver smooth power and good fuel economy. Compatible with Toyota Prius (2000–2009), Audi (2000–2015), Mercedes-Benz (2000–2010), and other models; part number 5604 VK20; thread M14x1.25, reach 26.5 mm, resistance 6 kΩ. Use a torque wrench to tighten to spec; avoid over-tightening or under-tightening; also clean around plug to prevent debris from entering cylinder.