The Lisle No. 71650 manifold drill template removes broken exhaust manifold bolts on GM EcoTec3 5.3L and 6.2L motors without damaging the cylinder head.
Tapered bolts center the base plate over the bolt holes and a slip fit bushing allows you to move from hole to hole without moving the base plate. The screw extractor is then used to remove the broken bolt. Includes bushing to drill to tap size when extractor cannot be used.
For more info: lislecorp.com