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I just installed mine today. When I first bought them I was under the impression they were AP2 tips. But now after comparing with the pics on this thread I'm pretty sure they're not. The size looks right but from the other photos posted the AP2 tips is cone shaped in the middle whereas mine is flat. After doing some research I'm pretty convinced they are 06-11 Civic Si tips. Overall I like them much more than my old ones.