I'd like a seat or two for my 1995 Miata, but not sure if I need custom rails.

For a Miata you might want to check out the Cobra Pro-Vs...Miatas are hard to find seats that will fit width-wise, especially at the shoulders.

You'd definitely need custom rails...and possibly brackets. I was lucky enough to get my Tillets to mount on the stock rails in the Miata but I think I was just unbelievably lucky.

For a Miata you'll want the seat super low, so rails and custom brackets would be your best bet.

I'd ask the guys at MSW - they should be able to supply you rails and fab up some custom brackets pretty easy for a perfect, and safe, fit.