The stud was in the manifold that holds the cat-pipe on, not the head. I've been spraying them with PB blaster for 2 weeks and that one nut was seriously rusted and the electric impact gun snapped it. I was able to get all the other off and the drier's side manifold is now off. I doubt I'll get the passenger side off tonight, but we'll see. Probably starting tomorrow around 10-11. I'll be needing some extra sleep after today.
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69 Z28 JL8 4 wheel disc brakes - being restored
09 Silverado Z71
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