AC Delco 41-962 Iridium Spark PlugThis AC Delco spark plug iridium construction provides outstanding strength and high temperature resistance. Iridium offers reliable cold starting, quick acceleration, and smooth engine performance. One-piece, fired-in suppressor seal blends three glass types for a gas-tight seal that helps reduce radio frequency and engine interference, regulate spark plug energy, and protect against compression pressures for long life.Benefits of AC Delco Spark Plugs Iridium Construction; High Melting Point; Laswer-Welded; Reliable Cold Starting; AC Delco 41-962 Interchange NGK PTR5D-10; Using the latest in spark plug technology AC Delco is a trusted brand that will provide quick start ups when it matters most.