I had no probkem with 3/8 ratchet I didn't even use pentatrant. My Dr Seuss ratchet is very thin very long it would probably snap at about 60 ft·lb and I've remove a dozen of these exhaust bolt/stud (stud will come out if the nut is fused.

They are a weird size nut don't lose track can't buy at a hardware store.

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2011 E70 • N55 (me)
2012 E70 • N63 (wife)