both places uses activant triad for their cataloging and parts lookup and when u select the integra from the menu and go to engine choices it will give you 1.8 DOHC as one option and the other is 1.8 VTEC. a inexperieced counterman would assume that you would have one or the other and not realize that the gsr is automatically vtec and dohc in the same boat. easy enough mistake for a guy who deals with 100's of cars a day