Like its name has implies, spark plugs fires an electrical charge that ignites an engine’s air/fuel mixture, which powers a vehicle’s pistons, which then enables the drivetrain to work at peak performance. So if your plugs are misfiring, we have the spark plug replacement choices you need to make your vehicles to perform better. Replacing worn spark plug wires will help too. And if you have motorized model cars or airplanes, replacing old glow plug parts can make these toys more fun. Zoro has electrical parts and engine components, and filter accessories to make your cars and trucks run better.