First thing is u need the 195/50/15 wheel.
Shod the rim with good rubber.
Then go hav a feel for the car.
If u dont go ballistic then stop upgrading as i think this is enough.
However i bet u won be satisfied and will agree that the suspension is a little too soft esp the rear.
Skip the spring rubber damper thing as it helps only a little which is good if u dont go mad everyday.
IMHO this rubber is more suitable to whom search for comfort as i feel much better on rough road with it on my rear OE spring.
Consider sport spring(front and rear) like Sapura proride.I dont hav them installed but they made great absorber and spring for the waja.
On the rear u might need the ARB but it wont help by much as its already on torsion beam.
One major thing u should not forget is upgrading the brake pad on both front and rear.
I've done mine on the front.Awaiting budget for the rear.
If u hav an air compressor at home,try shooting some air at the rear drum and watch yourself being laughed by bystander bcoz u will be covered in a puff of black cloud.
The OE pad is good only for normal driving.Its bad for high speed braking and when carrying load.
My front pad now is from Yamamoto.
The bite is great and convincing.
One more reason why i havent upgrade the rear brake shoe oso is bcoz i need size 30 socket to remove the drum.
Its not like our everyday Wira where the drum can be remove after removing the rim.
BTW when u got the rear ARB installed and not satisfied with it,why dont u sell it to me at 1/2 price
the sifu has spoken~~~ must listen...