let me answer it on behalf of drften.
he's letting go that seat 1 pair of cos.
the seat adjustment wasn't like recaro.
about the railing,maybe he nid to answer it by himself cos i don't have any knowledge about that kinda things.
chill!!
what are the mods we should do for big horsepower?
for eg. like changing to bigger turbines,pistons,high cams,metal gaskets,external wastegates...what else???