Can you remove studs from catalytic converter ?

Staples

Make sure you drill directly in the middle. Start with a smaller bit then work your way up until the stud comes out. The reason you do this is because it will soften the metal on the bolt until it crumbles.

This shouldn't be too bad on the cat, but it was a huge pain in the *** when a stud broke on my stock manifold.

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'08 Infiniti G37s - Forced Induction Fed