I did mine with car iddling, using oil when car is running createssmoke and fumes, so i did it without oil, and started with a smaller bit and a tad bigger and tad bigger than that one.. total of 4 different one's. That way the shavings stay smaller.
i also disconected my DP from the cat so that the shavings do not get lodged in the Cat. The shavings will just slide thru the turbo and you will be fine.
-Enes
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