Penske Racing Shocks

Piston, VDP / VDP (Velocity Dependent Piston)




Velocity Dependent Piston (VDP)

The Velocity Dependent Piston has the unique ability to be valved as a digressive piston, with the added versatility of being able to adjust the linear slope after the digressive knee on both compression and rebound. The VDP/VDP piston design allows the user to have maximum compression support and also maximum rebound control. This type of set up is usually best on smooth, flat surfaces. Very popular with Autocross type set ups. This is our most popular piston used to date.

  1. The Low Speed section is controlled by the amount of bleed, the outer valve stack configuration and the amount of preload to determine the knee/nose profile.
  2. The Digressive profile is set by the thickness of the outer stack. The amount of time that the curve stays digressive is also influenced by the stiffness of the inner stack and when it is initiated is also controlled by the preload.
  3. The Linear values and profile are set by the thickness of the inner stack.

Additional information

Weight 1 lbs
Dimensions 5 × 4 × 4 in


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