Shock Rebound Separation Valve - M16x1.25 0.0 - SMRS 1612500
The Rebound Separation Valve replaces the shock shaft nut with an asymmetric valve (it has a different flow in each direction). Testing shows that when rebound damping is quick enough to get good traction, the compression is too mushy. In the Dirt the RSV cures the vague feeling and bottoming. For Road, the added benifit is pitch control ( front to back movement during acceleration and braking).
The RSV was developed by Terry Hay of Shock Treatment.