The Autolite Iridium XP Automotive Replacement Spark Plugs, XP3923 (4 Pack) are high-quality spark plugs designed specifically for gasoline vehicles. With the OE/OEM part number XP3923 and manufactured by Autolite, these spark plugs offer reliable performance and durability. Made in Mexico, these spark plugs are a great choice for maintaining the ignition system of your vehicle, ensuring smooth operation and efficient fuel combustion.