The Splitfire Spark Plug-Split V Design, model SF40D, is a high-quality ignition system component designed for car and truck engines. Made in the United States, this spark plug operates at 1V of voltage and offers reliable performance for improved engine functionality. With its unique split V design, the Splitfire spark plug ensures efficient spark delivery and better combustion for improved engine performance and efficiency. Perfect for maintaining or upgrading your vehicle's ignition system, this spark plug is a dependable choice for precise and reliable engine operation.