Avid’s latest addition to their ever-expanding product line-up are these machined shock piston sets. The goal of these pistons was to reduce the oil blow-by on the outside of the piston and to tune the damping with the piston valving.
The 1031 pistons represent Avid’s latest development concept which helps tune high speed and low speed damping separately. This simple solution is a four-hole piston with two large and two small holes that they call the 2+2 piston. Avid’s test drivers found that these 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.

AV1031-1.5-1.1-F        12mm 2+2 Piston, 1.5 and 1.1 – Flat Associated, TLR, Kyosho
AV1031-1.6-1.1-F        12mm 2+2 Piston, 1.5 and 1.1 – Flat Associated, TLR, Kyosho
AV1030-2×1.6-F          12mm Piston, 2 x 1.6 – Flat Associated, TLR, Kyosho
AV1030-4×1.3-F          12mm Piston, 4 x 1.3 – Flat Associated, TLR, Kyosho

Source: Avid RC