The product is a set of genuine GM AC R44S spark plugs designed for use in Pontiac GTO and Firebird vehicles. These spark plugs are made of metal blued (black) material and are direct replacements for the original equipment manufacturer (OEM) part. With a voltage of 12 volts and a 3/8" reach, these spark plugs are performance parts that are manufactured in the United States. The product includes information sources that provide additional details about the spark plugs, such as superseded part numbers and interchange part numbers.