JRZ 14 52 Quadruple adjustable

  • Features
  • FAQ

What is the difference between the 14.51, 14.52 and 14.53

The 14.51 has a 22 [mm] strut shaft.

The 14.52 has a larger strut shaft.

The 14.53 is an upsidedown strut construction.

What 14 series should I choose

This depends on the application, when the car is subjected to high side loads upgrading to a larger shaft is recommended. Contact us or a dealer if you need help choosing.

What is the difference between 14.3x range and the 14.5x range

The 14.5x is featured with our 50-DA shaft, this allows you to fully operate only on the shaft/ only on the reservoir or a combination. With this feature you can adjust the amount of hysteresis.

The 14.3x is featured with our regular motorsport shaft with rebound (high and low( adjustment on the shaft and compression (high and low) adjustment on the reservoir.

JRZ 14 52

  • Rebound adjustment independent from compression
  • Fully useable adjustment range
  • 27 clicks rebound bleed on shaft
  • 27 clicks compression bleed on shaft
  • 19 clicks high speed compression on reservoir
  • 10 clicks low speed compression on reservoir
  • Even steps in damping adjustment per click
  • Check valves adjustable for initial nose tuning
  • Large, standard and fine bleed ranges
  • High volume canister
  • Adjustable gas pressure
  • 50 DA shaft
  • Double adjustable remote reservoir



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Improve your McPherson damper by upgrading to a larger diameter shaft. The larger shaft has a more rigid and stronger strut construction which benefits when side loads are applied. Side loads are applied when cornering, or braking.


With the larger shaft your JRZ has a large oil displacement so the damper creates damping forces at the smallest movements of the suspension.

The combination of the larger shaft and the use of nitrogen pressure results in a lifting force created by the damper. This lifting force is available through the whole stroke of the damper and works together with the spring, the lifting force is not a spring rate, but gives the car platform. Upgrading to a larger piston rod benefits the lifting force.  

The 50 DA shaft and FA 3030 Piston

Equipped with the 50 DA shaft and the FA 3030 Piston, combined they can provide almost any damping curve and adjustment style. User desired characteristics are easy to achieve with our valving matrix. The flow paths in the system are designed to produce significant low speed damping forces with low hysteresis. This is used with our proven damping philosophy in compression to give the moest direct JRZ feeling ever.

The FA 3030 piston allows a large range of dyno curces giving the race engineer the possibility to create specific damping characteristics and fine tuning options. The FA 3030 gives a high response system to be combined with the proven JRZ approuach to create compression forces from shaft displacement. This results in much improced chassis and ride height control while maintaining tire wear and compliance over bumps/kerbs. 

Valving on the FA 3030 piston can be chosen to create more or les direct damping at the piston, which will effect the amount of hystresis. 


  • Wide range of adjustment 
  • Easy to create costum curces with JRZ valving matrix and database. 
  • Effective "ultra low speed" damping adjustment
  • Four zones of damper velocity independently tunable 
  • Evenly spaced adjusments from full soft to full stiff
  • Modular to all JRZ motorsport dampers
  • Very low hysteresis
  • Fine adjusments steps

Possible characteristics

Digressive compression adjustments

Digressive rebound adjustments

Lineair compression adjustments

Lineair rebound adjustments