thanks for your help everyone.
I have successfully fitted the strut brace

and i can feel a difference,
it's alot more sensitive and i can accelerate in the corner with out having to worry bout understeer lol

.
The firewall is thicker than a popsicle stick here it's about maybe 0.5cm's we use metric here so someone can calculate that into your terms lol. it took a while to get through it with a plug in power drill but i have done it so im happy lol
thanks for everyones help again i appreciate it

i can finally relax for a while and stop trying to search for more stuff to buy lol until next year when i start to make my exhaust syatem in technology at school lol