XRAY racers can now run the signature AVID machined piston setup on the XB4 buggy.   The AV1033 pistons are custom machined for XB4 shocks to tune high speed and low speed damping separately with 2 large 1.5mm (or 1.6mm) holes and 2 small 1.1mm holes (we call it 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.

Starting Setup Tips:

Use 1.5+1.1 piston in XB4 Front. Start with 35 wt Associated oil  (425 cSt).   For XRAY oils, use 450 cSt.
Use 1.6+1.1 piston in XB4 Rear.  Start with 30 wt Associated oil (350 cSt).  For XRAY oils, use 350 cSt.

Piston Features:

1. Fits  XRAY XB4 shocks
2. Machined perfectly round with a tighter fit to bore of shock body for less blow-by
3. AV1031 pistons with 2+2 valving offer increased traction without sacrificing jump handling or driveability.
4. Each package includes 4 pistons inside of a Doodad container printed with AVID logo.