Code No. 80300-AN010



Going beyond just ride comfort or handling performance, a new standard of "Driving Comfort" aims for comfort in ride but also in the peace of mind generated by handling performance and drivability . An uncompromising balance which delivers on all the demands of street driving.



※The above photo is an item for Z34. 

The model in the photo is Z33.




Engine VQ35DE
Model Year 02/08 - 07/01
Remarks Fairlady Z Roadster is not compatible as it has not been tested.


Damping force adjustment 30 steps 30 steps
Base valve - -
Height adjustable lower bracket
Upper mount Rubber Rubber
Inverted/Normal type Normal Normal
Damper/Spring layout Coilover Separated
Spring rate change at factory Possible Impossible
Damping force adjustment with wire -
Helper spring
(Spring rate N/mm)
〇 (19.8) -
Ride Height mm
  Factory *2 Test data Adjustable range
High - Low *3
Drivable range
High - Low *4
FRONT Ride height *1 683 694 ~ 649 694 ~ 649
Against stock -12 -1 ~ -46 -1 ~ -46
REAR Ride height *1 684 698 ~ 649 698 ~ 649
Against stock -15 -1 ~ -50 -1 ~ -50

*1. Height from road surface to fender arch.
*2. Height at factory is the data tested at HKS with the setting of Full Kit. (HKS' recommended setting.)
*3. Adjustable range (However, the lowest value may not be road legal.
Even within the adjustable range, car body, arm etc. may contact. In such case, it will be hard to drive.
Damper oil leakage or any other problems caused by low ride height setting from the factory setting will void the warranty of the product.)
*4. Drivable range that there is no contact of car body or arms etc. (However, change of tire/wheel size may cause a problem.)
Caution). Actual data depends on each vehicle.

Kit information

Spring of Full Kit

  F R
Spring rate N/mm(kgf/mm) 98 ( 10.0 ) 88 ( 9.0 )
Free height (mm) 220 -
Spring type Straight Barrel type Special shape
Recommended range to change spring rate N/mm(kgf/mm) +20 ( 2 ) -

Specification of damper

  F R
Damping force (Rebound/Damping)N* 1015 / 432 579 / 319
Default position of dial 15 15
Remaining damper stroke (Rebound/Damping)mm 47 / 52 68 / 68

* The value of the damping force is at piston speed of 0.1m/sec.

Setting data

  F R
Default Test Drivable limit
High *
Drivable limit
Low *
Default Test Drivable limit
High *
Drivable limit
Low *
Length of
case (mm)
479 479 479 331 343 319
Set length(mm)
246 239 268 - - - -
Length to ride hight
adjuster (mm)
34 41 12 43 52 21
Lever ratio 1.54 1.59(spg) , 1.18(dmp)

* Refer to the above explanation *3 of ride height information for drivable high and low limitations.

Test vehicle information

  F R
Vehicle weight kg 838 (780) 685 (670)
Tire size (Air pressure) kPa 235 / 40 - 19 ( 240 ) 265 / 35 - 19 ( 240 )
Wheel size 9.0 JJ × 19 inset 35 10.0 JJ × 19 inset 35
Test data out 1 mm / -1°06' in 2 mm / -1°55'
Standard value in 1 ± 1 mm / -0°40' ± 0°45' in 1.9 ± 0.8 mm / -1°35' ± 0°30'

* Test data at HKS.

Parts List  * It may be changed without prior notice. 



MAX4GT has been reviewed and renewed to make it easier to handle and more versatile.
The front rate has been increased by 1K to provide better cornering performance than before. We aim to provide a properly supple driving experience.
Both front and rear are equipped with PVS and high flow rate needle, and the synergistic effect of these two elements quickly boosts damping force in the necessary areas and cuts off the unnecessary movements. The damping force is precisely controlled to provide a stable and comfortable ride quality.
Even though helper springs have been equipped to the front to provide sufficient stroke on the extension side, as well as a sufficient ride height adjustment range, in order to surpass the previous one which had a slight height adjust amount
The rear damping adjustment dial used to be set on the tire side, but this time we have significantly reviewed the components and changed it to an upright type that makes it easier to adjust the damping.
By doing some interior cutting, it is easier to adjust the damping adjustment directly via wires making it easier to use in different situations.
It is recommended for a wide range of users, from street driving to winding roads and track.
※Test vehicle was tested by replacing the front lower arm with a new stock one. We recommend that you check the condition of the front arm bushings for cracks when installing the product in order to maximize the potential of the vehicle.
※The FAIRLADY Z ROADSTER is not compatible because the installation has not been checked. Thank you for your understanding.