Has anyone 100% confirmed whether or not the factory Si catback (mainly just the B pipe) ABSOLUTELY fits the non-Si? If not, I will have a definite answer for this question on Saturday. I went to Honda to order a new non-Si B pipe and the part department associate decided to order a Si B pipe as well so we could compare the differences (other than the piping size) in order to determine if it will fit or not. Now that I think about it, I should have had him order both A pipes to compare as well.