Complete Spark Plug Repair Kit This allinone kit from Orion Motor Tech includes a cylinder leak tester, lineup guide, twist drill, screw tap, six snap iron pieces, and eight M141.25 inserts, restoring damaged threads quickly and easily Effortless Thread Repair This spark plug thread kit quickly fixes worn or stripped threads, allowing easy rethreading without the need to remove the cylinder head. Get your engine back to peak performance with minimal effort and cost Versatile Compatibility Perfectly designed for Ford vehicles from 1996 to 2003 with 4.6L, 5.4L, and 6.8L V10 twovalve engines, this 38900 ford spark plug repair kit ensures a precise, hasslefree thread repairs Built to Last Crafted from tough highspeed steel and AISI 1045 steel with a phosphate coating, this sparkplug repair kit handles tough repairs with ease while resisting corrosion, ensuring reliable and longlasting performance Tips for Processing Make sure to use a borescope to verify that the piston is lowered by at least 2 to 4 to prevent damage. Additionally, check valve closure with a cylinder leak tester and clean away any debris before proceeding