Tune Up Kit for 05-08 Jeep WK Grand Cherokee or XK Commander w/ 3.7L Engine Crown AutomotiveTune Up Kit for 2005 2008 Jeep WK Grand Cherokee or 2006 2008 XK Commander w 3. 7L Engine, Includes Spark Plugs, Air Filter, and Oil Filter Features and Benefits: 12 Month Warranty For Models w 3. 7L Engine Includes Spark Plugs, Air Filter, and Oil Filter Spark Plugs Are Not Pre Gapped Use Existing Hardware Details: Material: See Components Hardware Included: Use Existing Hardware Interchange: TK 47 Application: 2005 2008 Jeep WK Grand Cherokee w 3.