Sorry for the slow response, I don't visit here much. Anyway my Seats are custom built by a company in Phoenix called Renegade. I started with their tubular steel seat frame and modified it myself to fit (no seat rails, it bolts directly to the floor) and took the frames back to them and they finished them. I'm 6'2" 290 Lbs, gained room and I'm comfortable and sit down lower in the car. Cost about $600.00 Hope that helps

Is you v8miata still on the market-where is it located. Thanks john