The Lisle Manifold Drill Template for GM EcoTech3 5.3L and 6.2L is designed to remove broken exhaust manifold bolts without damaging the cylinder head. The tapered bolts center base plate over bolt holes and slip fit bushing allows you to move from hole to hole without moving base plate. The screw extractor is then used to remove the broken bolt. It includes bushing to drill to tap size when extractor cannot be used.
