I never said it wouldn't MAKE a difference. I stand by it. I meant you'd never know the .2 was there without the clock. Getting caught up in numbers can empty an otherwise healthy pocketbook. For most guys with average street cars stuff like this is a waste of money.
And I know the difference between bends. I ran a standard die and shoe machine for a couple of years. You can achieve mandrel bends on one too. It's a little trouble. I had a few jobs I did it for. I welded a cap on one end of the pipe, filled it with sand and welded another on the other end. Comes out the same diameter all the way through the bends, for just a few minutes more work.
