stage 3: larger swaybars, energy suspension control arm bushings, strut bars(fu/fl/ru/rl), x drilled/slotted gsx rotors&calipers up front with high performance brake pad set(also drum to disc conversion for RS).
stage 4: big brake upgrade all around, lightweight 17" wheels, and a trip to the corner weights.
stage 5: removal of everything that adds weight, 6 pt roll cage, another trip to the corner weights.