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Here are a couple more tips to add to Tonys above if you are looking at doing this yourself.
1. The shroud comes out the top after you remove the little extension piece at the bottom rear. You have to get under the car anyway to remove the 2 bottom screws.
2. I found it heaps easier to remove the 4 bolts holding the fan on and getting it out of the way. Will save you some skin if you take the time to remove it.
3. The picture below shows which bolts you need to loosen/rotate/tighten.