Autolite Double Platinum APP5224 Spark Plugs 4-Pack is a set of four spark plugs that are direct replacements for various Jeep models and other vehicles. They have a double platinum, platinum, or copper core, depending on the type, and come with a manufacturer warranty of up to 5 years. The bundle includes 4 genuine Autolite spark plugs and there is no core charge. The item length is 3.380 inches.