Sorry missed you joining, was away on a nice cruise.
Yes sticky with highest octane you can find. From mid to high grade you will pay maybe a buck more per fill up.
On the SAI, all USA models came with it. If you look closely you might be able to see if the SAI hoses are still there front, top of cam cover. There is Angryroosters's mod and block off plates if you like a quieter decel.
Check out his mod in a sticky I thought (top of each section) Should be able to see the hoses I'm talking about.