As far as I know only 21 Evolutions were created....not 100% sure on that though.
They had an adjustable rear spoiler (with an elevated wing section) and fastening pins on the front lid/boot. They also featured an FIA roll cage, Recaro racing seat/six-point harness, and fire-extinguisher.
Again this info was probably found on the net at some stage so I can't confirm its accuracy.
