The Spark Plug ACDelco 41-983 4pack is a set of high-quality spark plugs designed for professional use. With a length of 5 inches, these plugs are suitable for various ignition systems in cars and trucks. Manufactured by ACDelco Professional, a trusted brand in the automotive industry, these spark plugs ensure reliable performance and durability. Perfect for maintaining or upgrading your vehicle's ignition system, this product provides the necessary components for a smoother and more efficient engine operation.