AC DELCO MR41T4 AC Resistor Spark Plug

The AC Delco MR41T4 resistor spark plug delivers reliable ignition performance across General Motors vehicles and most other makes and models. Its copper core excels at heat transfer, extending plug life and maintaining consistent firing. The ribbed suppressor seal resists degradation while preventing spark flash-over and misfires that compromise engine efficiency. A nickel-chrome alloy sheath protects the center electrode from corrosion, ensuring longevity in demanding conditions. This premium aftermarket replacement meets OEM specifications for fit, form, and function, making it an ideal choice for those seeking dependable spark plug performance without compromise.