Nakamura Naoki uses the D-Max coilover without any modifications. No swapping of spring rates or anything. You will also notice the shock dynos and what settings Nakamura-san uses during the D1 competition at Sekia Hills.
The difference of dampening is night and day, and can only really be experienced in person. Coupled with 32-way adjustments, the dampening can be set softer to almost stock levels, or all the way to hardcore track level stiffness.
Features at a glance:
32 way adjustable dampers
Inverted monotube for front, standard monotube for rear
Camber adjustable pillowball top mount in the front