The ProMAXX Myra 200 Series ProKit is engineered for the Dodge/Jeep 3.7L and 4.7L V8 engines to facilitate the quick removal of broken exhaust manifold studs and bolts. The tool guarantees alignment and perpendicularity of drilling dead center, requiring less torque and reduced risk of screw extractor breakage. The Myra 200 Series eliminates accidental drilling into the coolant passages, and can support the removal of broken screw extractors, reducing cylinder head removal. This kit is made in the U.S.A. using American craftsmen and American-made materials, and comes with a limited lifetime warranty.