Discover resistor spark plug wires & inductive resistor spark plug. Explore inductive suppressor spark plug. Find best resistor spark plugs for your engine. Maintaining your vehicle's performance is pivotal, and that includes keeping an eye on your Resistor Spark Plugs. These crucial components, available in various materials like copper, platinum, and iridium, each with unique benefits, require regular inspection to ensure optimal combustion and fuel efficiency. Signs that a replacement might be needed include misfires, rough idling, or difficulty starting your car. When selecting the right spark plug, consider your engine's specifications and driving conditions to match the plug's features with your needs. For seamless installation, always apply anti-seize compound on the threads and ensure the correct gap setting for a strong spark.