Ensure your vehicle's engine is running smoothly with the ACDelco 5613717 Ignition Spark Plug. Designed to fit a wide range of models, this single piece spark plug is a direct replacement for the manufacturer part number R42LTS and interchange part number 5613717, making it a reliable choice for your ignition system needs. Crafted with the quality you expect from ACDelco, this spark plug is an essential component for your car's ignition system. It is compatible with various engine types and is designed to provide reliable performance and durability. Keep your engine running at its best with this essential spark plug.