Yep - the center bore on the Miata wheels is too small, so you'll have to have the machine shop enlarge the diameter by 2mm, I think.

It's been done before on Hondas, so you may want to do a quick Google search to make sure there weren't any other issues with your particular Civic model.

My apologies to the mods for posting a link to another forum, but here's some more info and pics about Miata wheels on Civics. I see there's some incorrect info on there regarding wheel dimensions and weights, though.

I'm a pretty big Miata guy, so if you have questions about what wheels came on what car, or the difference in the various styles, feel free to ask.