In our case, the Hemi exhaust manifolds ... of the bolt and then step up the drill size in increasingly larger increments until you're almost at the threads. Then, you can use an extractor to ...

The Broken Bolt Extractor, with the help of a drill, extracts broken bolts in exhaust manifolds ... The kit comes with a case, a tap wrench, six hardened fixture washers and 14 plastic containers ...