S
IMPREZA WRX STI
IMPREZA WRX STI GRF

S

Code No. 80300-AF001P

 

  

Another type of HIPERMAX S that employs the pillow ball spherical bearing at the front upper mount has been newly added.

 

 

  • The front upper mount employs the pillow ball spherical bearing. It makes it possible to change the camber angle compared to the existing rubber bearing type of the HIPERMAX S.  A direct handling feeling of the car from the pillow ball top mount brings more joy to driving.
  • Accomplish the suspension to provide a sense of stability based on the flexible setting to optimize the speed of the car roll for improving the roll rigidity.
  • It enables to drive while bringing out the gripping force of the tire maximally thanks to the calm behavior of the vehicle in sports driving.
  • 3-year warranty is included for the highly durable product with the reconsidered internal parts.

 

 

The model in the photo is GRB.

 

 

Application

Engine EJ25(TURBO)
Model Year 09/02 - 14/08
Remarks  

Specification

  FRONT REAR
Damping force adjustment 30 steps 30 steps
Base valve - -
Height adjustable lower bracket
Upper mount Spherical bearing Rubber
Inverted/Normal type Inverted Normal
Damper/Spring layout Coilover Coilover
Spring rate change at factory Possible Possible
Damping force adjustment with wire - -
Helper spring
(Spring rate N/mm)
〇 (4.7) 〇 (4.7)
Ride Height mm
  Factory *2 Test data Adjustable range
High - Low *3
Drivable range
High - Low *4
FRONT Ride height *1 654 680 ~ 629 680 ~ 629
Against stock -31 -5 ~ -56 -5 ~ -56
REAR Ride height *1 650 679 ~ 614 679 ~ 614
Against stock -34 -5 ~ -70 -5 ~ -70

*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 ( 9.0 ) 69 ( 7.0 )
Free height (mm) 220 170
Spring type Straight Barrel type Straight
Recommended range to change spring rate N/mm(kgf/mm) ±10 ( 1 ) ±10 ( 1 )

Specification of damper

  F R
Damping force (Rebound/Damping)N* 667 / 549 353 / 382
Default position of dial 15 15
Remaining damper stroke (Rebound/Damping)mm 49 / 64 60 / 59

* 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)
254 278 246 262 283 236
Spring
Set length(mm)
247 247 262 220 220 220
Length to ride hight
adjuster (mm)
23 47 0 39 60 13
Lever ratio 1.10 1.38

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



Test vehicle information

  F R
Vehicle weight kg 893 (890) 627 (590)
Tire size (Air pressure) kPa 255 / 35 - 18 ( 230 ) 255 / 35 - 18 ( 190 )
Wheel size 8.5 JJ × 18 inset 55 8.5 JJ × 18 inset 55
Alignment
(Toe/Camber)
Test data in 0 mm / -1°50' in 0 mm / -2°10'
Standard value in 0 ± 3 mm / -0°40' ± 0°45' in 0 ± 3 mm / -1°35' ± 0°45'

* Test data at HKS.


Parts List   * It may be changed without prior notice.

 


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