T301 - USP GRAPHITE FLEX FRONT SHOCK TOWER
By reducing the rigidity of the front shock tower connecting point to the upper bulkhead, the stiffness around the front bulkhead section is reduced and the overall chassis flex is increased, resulting in a calmer initial steering response. This reduction in initial stiffness helps smooth out cornering and can help reduce tyre wear.
T302 - USP GRAPHITE FLEX REAR SHOCK TOWER
By reducing the rigidity of the rear shock tower connecting point to the upper bulkhead, the stiffness around the rear bulkhead is reduced and the overall chassis flex is increased allowing for smoother rear rotation. For normal body post.

Source:

J. Sawada