In my experience "universal" means most but not all. You may have to find or fabricate a mounting bracket. But you never know you may get lucky. Do you have any pics or measurement specs of the seats or the mounting assembly? I'm sure with that info someone here could give you a definite answer.
This is the only fitment info:
Fitment Notes: These seats are side mount style seats, so you will need to pick up a side mount seat base kit for your vehicle to install these. We recommend using a Buddy Club Seat Rail Kit, but you can instead purchase a Sparco seat base, Sparco side mount adapter, Sparco hardware kit, and optional Sparco slider set if you prefer. If your factory seats come with airbags built into them, these aftermarket performance seats will not allow you to re-use those airbags, and do not feature any airbags of their own either. Removing factory seats that feature airbags has safety implications, so please consider this before making your purchasing decision.
So it says I need to pick up a side mount seat kit for my vehicle. Then it says they recommend the Buddy Club seat rail kit, but that kit is what is universal. I would prefer to do that because it's about $150 cheaper than the Sparco option, which I'm not even sure if Sparco offers a FiST specific application.