Originally Posted by tomkk
That is, if it's already installed, is there any reason to remove it?
If there was, a notification would have been published recommending that they be removed.
More recent testing showed that the cyl. cooling was about the same with or without the shroud, so it was deleted to reduce the kit cost and reduce the chance of a builder induced problem during the engine disassembly and reassembly that was required to install it.