Code No. 80230-KH001C


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






Engine L15B
Model Year 17/05 - 
Remarks Only for Si Grade / Front Knuckle Insertion Dia. 53.8mm


Damping force adjustment 30 steps 30 steps
Base valve - -
Height adjustable lower bracket -
Upper mount Rubber Rubber
Inverted/Normal type Inverted Normal
Damper/Spring layout Coilover Separated
Spring rate change at factory Possible Possible
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 *1 649 671 ~ 628 659 ~ 628
Against stock -22 0 ~ -43 -12 ~ -43
REAR Ride height *1 662 681 ~ 621 681 ~ 648
Against stock -19 0 ~ -60 0 ~ -29

*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) 39 ( 4 ) 39 ( 4 )
Free height (mm) 220 220
Spring type Straight Barrel type Straight Barrel type
Recommended range to change spring rate N/mm(kgf/mm) + 19 ( 2 ) + 10 ( 1 )

Specification of damper

  F R
Damping force (Rebound/Damping)N* 343 / 157 314 / 108
Default position of dial 15 15
Remaining damper stroke (Rebound/Damping)mm 61 / 57 66 / 93

* 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)
230 230 230 370 390 360
Set length(mm)
199 189 220 - - - -
Length to ride hight
adjuster (mm)
21 31 0 38 56 29
Lever ratio 1.00 1.07(spg) , 0.94(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 - (795) - (524)
Tire size (Air pressure) kPa 235 / 40 - 18 ( 225 ) 235 / 40 - 18 ( 200 )
Wheel size 8.0 JJ × 18 inset 50 8.0 JJ × 18 inset 50
Test data 0 mm / -1°00' IN 1.1 mm / -1°30'
Standard value IN 0 ± 2 mm / -0°20' ± 30' IN 2 +2 -1 mm / -1°20' ± 45'

* Test data at HKS.

Parts List  * It may be changed without prior notice. 



The rear side’s stiffness and insufficient vehicle body roll under SPORT mode are improved while maintaining the factory supple damping feeling and handling to provide a fun to operate the load movement.
For a better cornering operation, the vehicle body roll is reduced. Lowering vehicle height allows not only for the appropriate appearance for Si model but also provides better ride comfort.
The stock front suspension design is very complex like S660; after studying the internal structure, to improve the complexity HKS traditional single tube inverted type is selected for the front side. The sufficient stroke is maintained to provide a better drivability and driving performance even without the body-length adjustable system.
The camber adjustment upper plate positioning bolt for the front side is included. The camber position can be selected from the stock position and ±0.5°of the stock position.
The rear damping force adjustment cable allows simple adjustment that is not required lifting the vehicle or removing the dampers. The straight springs also allow a better flexibility of setup.
Compared with the existing Hipermax IV GT series, the ride comfort is more focused on, and the vehicle body roll is reduced especially for Si grade. The comfortability and handlability are implemented together.
For more reliable driving, increase the damping force by adjusting the dial. Adjust the damping force for your purpose of driving.
The error message comes on when the stock suspension is removed. It can be canceled by installing an error canceller available separately.
Suspension Error Canceler:
※To remove the stock suspension, removal of the front knuckle and hub assy is required. It is recommended to perform removal of the front knuckle and hub assy by a professional.