Allowing the 911 fan is not performance advantage. I understand the cost to purchase one is ridiculous. That said it should be allowed as a option for guys that already have them. Not only do I have one but also have spares. I would have to spend more buying spares, fan shroud etc. I also thought going to the pump gas option was also for reliability, There is no way that a China alternator is more or even close to being as reliable as a 911. VW alternators are junk, ask Darren Walsh how many times he had to change his at the 1000? Too bad it’s not allowed in SNORE.