Manufacturer part numbers are vehicle specific， and price varies by application. Installation fees may apply.FeaturesAC Delco Professional Platinum Spark Plugs are ideal for engines that run on conventional plugs and newer engines that require platinum plugsDual platinum tip for improved resistance to spark erosion， fouling， and corrosive combustion chamber environmentA platinum center electrode and a platinum pad lower the ignition demand voltageOne - piece integral suppressor seal helps reduce radio frequency interference， meters spark plug energy to help provide long electrode life， and seals against compression leakageDesigned with corrosion - resistant shellSpark gap remains virtually unchanged during the life of the plug