HKS Hipermax Max IV GT Coilovers Nissan 350Z 2003-09 80230-AN010

by HKS
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SKU 80230-AN010

The new Max IV sporty suspension. Awesome sporty drive with great control and comfortable ride in the street. It's perfect for a daily street drive with style and performance. You and your passenger can have a comfortable ride even with a low-down.

Single Tube Damper Design

Monotube dampers allow for more accurate and stable control and adjustment of dampening. Lower ride height and center of gravity gives a more stable ride.

 Dust Boot

Protect the shaft from the flying stones.

PNE Coating

Using this special surface coating provides 5 times better durability over standard galvanising. This prevents build-up around the threads of the adjustment areas allowing for easier height adjustment.

"M Shaft"

With the new design of cylinder shaft since the HIPERMAX M-1, MAX IV increased the cylinder shaft size to have a firm damping even at a little stroke range because of the optimized oil pressure characteristic. We mainly adopted this to the rear damper that can have better driving experience.

 New Design Needle

A newly designed needle has been used to revise the very low speed and middle and high-speed dampening which is key to a comfort ride.

 Reduction of Unsprung Weight

In order to reduce unsprung weight, bracket, ride height adjusters and lock nuts are made from aluminum. (Not for all vehicles)

 30 Step Damping Force Adjustment

30 levels of dampening adjustment allow fine tune adjustment for street or circuit.



MAX IV GT Code No. 80230-AN010

▲The above photo is an item for Z33.

Awesome control and comfort ride on the street for a sporty drive. The new Max IV sporty suspension.

Application   Specification
Engine VQ35DE, VQ35HR
Model Year 02/07 - 08/11
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)
- -

Ride Height mm
  Factory *2 Test data Adjustable range
High - Low *3
Drivable range
High - Low *4
FRONT Ride height *1 665 677 ~ 639 677 ~ 654
Against stock -12 0 ~ -38 0 ~ -23
REAR Ride height *1 684 699 ~ 649 699 ~ 649
Against stock -15 0 ~ -50 0 ~ -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) 88 ( 9 ) 88 ( 9 )
Free height (mm) 250 -
Spring type Straight Special shape
Recommended range to change spring rate N/mm(kgf/mm) ±20 ( 2 ) -
Specification of damper
  F R
Damping force (Rebound/Damping)N* 1285 / 275 637 / 167
Default position of dial 15 15
Remaining damper stroke (Rebound/Damping)mm 49 / 51 65 / 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)
479 479 479 257 270 244
Set length(mm)
243 235 250 - - - -
Length to ride hight
adjuster (mm)
47 55 40 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 838 685
Tire size (Air pressure) kPa 225 / 45 - 18 ( 240 ) 245 / 45 - 18 ( 240 )
Wheel size 8 JJ × 18 off 30 8.5 JJ × 18 off 33
Test data 0 mm / -1°18' 5 mm / -3°00'
Standard value in 0~2 mm / -0°40' ± 0°45' in 1~3 mm / -1°35' ± 0°30'
* Test data at HKS.

Parts List * It may be changed without prior notice.

・This damper is for city drive with comfort.
・The riding quality and traction improved greatly by giving more rear stroke.
・We have set it least damping force for the most smooth suspension system. It will have great driving feeling because we eliminated the floating feeling or thrust.
・Recommended dial setting is F:12 & R:15
・Factory setting has low down width because stock vehicle has the lowest vehicle height from the ground. And still it doesn't have stock high center of gravity feeling and feel great without roll.
・The vehicle height data from other than the test is computational data.(The numbers does not guaranteeing the height)

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