When running your oil lines, do not use wire tires to hang them over the cat converter.
Why?
Because the wire ties might break and your oil line will fall to rest on the cat.
So?
Then you get a huge cloud of white smoke, a tapping noise from your engine, the oil light comes on, and the car dies.
The lesson;
Use really strong wire ties,
or,
don't run your lines anywhere near the cat.
Oil, oil everywhere!