[adamjwilson]

A chain pipe cutter has other purposes other than just cutting exhaust pipe. It will cut any metal pipe such as black iron piping or hard plastic piping.
If you have done your fair share of exhaust work then you would know a flat metal file will not de-burr the inside of a round exhaust pipe- lol (you stated "common metal file round and or flat deburrs perfectly.")

Look- I have done plenty of these Borla and Corsa exhausts on both cars and trucks both on lifts and on the ground with jacks, so I am providing helpful tips for the thread.