understeer = when u going through a corner, the car feels hard to turn into the corner like it wanna go the opposite way
oversteer = when u going through a corner, the car feels like it wanna go in faster and your rear feels like it's going to slide out
use wira SE spring for front since it's shorter. the absorbers are same for 1.5/1.6. only the springs on 1.6 is longer and harder compare to 1.5. absorber wise, proride yellow will give a very firm damping. the black proride is slightly stiffer than stock absorber. want comfort and stock, buy ori KYB. haha