MAX IV GT IMPREZA WRX
Explanation of the product Application chart

IMPREZA WRX GHE
MAX IV GT Code No. 80230-KF002
 
 


▲The above photo is an item for GRB.

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



Application   Specification
Engine EJ25
Model Year 07/06 - 14/07
Remarks  
 
  FRONT REAR
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 Coilover
Spring rate change at factory Possible Possible
Damping force adjustment with wire - -
Helper spring
(Spring rate N/mm)
○ ( 4.7 ) ○ ( 4.7 )


Ride Height mm
  Factory *2 Test data Adjustable range
High - Low *3
Drivable range
High - Low *4
FRONT Ride height *1 647 688 ~ 599 680 ~ 599
Against stock -41 0 ~ -89 -8 ~ -89
REAR Ride height *1 655 680 ~ 590 680 ~ 590
Against stock -25 0 ~ -90 0 ~ -90
*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) 79 ( 8 ) 59 ( 6 )
Free height (mm) 220 170
Spring type Straight Barrel type Straight
Recommended range to change spring rate N/mm(kgf/mm) ±20 ( 2 ) ±20 ( 2 )
Specification of damper
  F R
Damping force (Rebound/Damping)N* 971 / 412 392 / 147
Default position of dial 15 15
Remaining damper stroke (Rebound/Damping)mm 45 / 68 49 / 67
* 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)
279 302 273 264 284 239
Spring
Set length(mm)
249 242 287 210 210 236
Length to ride hight
adjuster (mm)
48 78 4 51 71 0
Lever ratio 1.1 1.27
* Refer to the above explanation *3 of ride height information for drivable high and low limitations.


Test vehicle information
  F R
Vehicle weight kg 836 583
Tire size (Air pressure) kPa 215 / 45 - 18 ( 230 ) 215 / 45 - 18 ( 220 )
Wheel size 7 JJ × 18 off 55 7 JJ ×18 off 55
Alignment
(Toe/Camber)
Test data 0 mm / 1°18' 0 mm / 1°30'
Standard value 0 ± 3 mm / -0°10' ± 45' 0 ± 3 mm / -0°10' ± 45'
* Test data at HKS.


Parts List * It may be changed without prior notice.


Point
“Natural steering feeling” so that a driver can trace the line as desired was pursued, and smooth cornering as STI's unique handling characteristic.
Focusing on driving stability during cornering to match the vehicle's characteristics, supple damper movement can stabilize the vehicle body movement so the tires can continuously contact even on rough road surfaces.
The stock rear suspension's stiffness was improved so driving comfort can be maintained under long-distance driving maintaining its sportiness.
Utilizing the helper springs in both front and rear dampers enables to secure the stroke of the extension side as possible.
 
 
 
 
 
 
 


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