Avid XB4 machined 2+2 shock pistons
Avid introduce these 2+2 hole shock pistons for the Xray XB4 buggy. They are machined for best possible precision and feature a 2+2 hole design to fine-tune high speed and low speed damping separately. Available are two variants with 1.5mm/1.1mm and 1.6mm/1.1mm holes. The pistons help provide the traction and bump handling of running lighter shock oil or larger piston holes, while still maintaining the control of running heavier oil or smaller hole piston when taking on jumps.
Source: Avid [avidrc.com]