Repair Broken Exhaust Manifold Bolts on 2017?Current GM 6.6L Duramax Engines Without Removing the Cylinder HeadA precision-engineered solution designed specifically for the 2017?present GM 6.6L Duramax diesel platform (L5P).This kit offers exact alignment and coverage for all eight exhaust manifold bolt positions on both driver and passenger sides.This kit allows you to drill and tap broken bolts straight and true?without using extractors or risking damage to the cylinder head.Includes CNC-machined alignment fixtures, guide bushings, drill bits, tap, and hardware to restore exhaust manifold mounting surfaces accurately and efficiently.Perform repairs in as little as 15 minutes per bolt.