[edwinm3]

If BMW decided to put flex sections on theirs it was for a reason. Have you seen the length of our exhausts? I wouldn't want all that stress of those heavy long exhaust pipes trying to move up and down, front and rear and nothing allowing it to do so, that's a lot of stress on the turbo flanges.
Flex sections will allow for some movement there taking a lot of the stress off the other (Very expensive) parts.