I have a set of these seats, paid $100 for them. Although they are vinyl/cloth, the need re-covering. I haven't gotten around to mounting them, but, I think the stock GT rails can be adapted. I did mount a set of Recaros in my Sportwagon, check in "member's photos" under " "bqs4", it's on the second page of pictures. These I took the stock Manta/Sportwagon/Sedan seats and stripped them down and came up with a excellent adaptor to put most aftermarket seats on and there's no modification to the floor of the Manta/Sportwagon/Sedan. It just takes a bit of work and two welds and you have a free adaptor. The best part is it retains the easy removal aspect to clean under or re-carpet.