The Lot of 4 Mighty RF42 Power Core Spark Plugs is a set of high-quality spark plugs designed for car and truck ignition systems. Manufactured by Mighty, these spark plugs feature a unique Power Core design that ensures reliable performance. With the manufacturer part number RF42, these spark plugs are compatible with a wide range of vehicles and provide optimal ignition for improved engine performance. This product is ideal for car enthusiasts looking to upgrade their ignition system with durable and efficient spark plugs.