BUCKET

A fixed bucket seat is dollar per dollar, by far the best performance mod you can do on a car. The difference in lateral hold is night and day. They also reduce weight by a few pounds at the least, sometimes dozens at the most. But most importantly in a car with a low roof like an FC or FD, they give you extra headroom. A one-piece composite side-mounted seat is pretty much the only choice worth making for that reason alone.