I know a friend who was selling his 1998 Integra coupe mirrors. He bought a set of M3 mirrors. I bought them from him hoping that they will fit on my 98 Civic HB. I always thought that they were interchangeable. I was wrong. The screw holes don't line up and one of the corners of the integra mirror triangle was pointy. The corner on my Civic is round. Anyway, it didn't fit and I got a little pissed off. my friend took them back without charging me.