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HKS Hipermax IV GT Suspension Subaru WRX STI VAF EJ25 80230-AF008

MAX IV GT Code No. 80230-AF008

‰Ð_The above photo is an item for ZN6.

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

Application ‹ÛÛ Specification
Engine FA20(TURBO)
Model Year 14/** - 
Remarks USDM FA20 6MT
Damping force adjustment 30 steps 30 steps
Base valve - -
Height adjustable lower bracket 䄆 䄆
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)
䄆 ( 4.7 ) 䄆 ( 4.7 )

Ride Height mm
  Factory *2 Test data Adjustable range
High - Low *3
Drivable range
High - Low *4
FRONT Ride height *1 648 ‰ � 675 •__ 620 675 •__ 627
Against stock -27 ‰ � 0 •__ -55 0 •__ -48
REAR Ride height *1 659 ‰ � 679 •__‹ÛÛ605 679 •__‹ÛÛ605
Against stock -20 ‰ � 0 •__ -74 0 •__ -74
*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) 78 ( 8 ) 59 ( 6 )
Free height (mm) 220 170
Spring type Straight Barrel type Straight
Recommended range to change spring rate N/mm(kgf/mm) å±20 ( 2 ) å±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 62 / 51 61 / 55
* 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)
269 ‰ � 285 269 253 ‰ � 269 235
Set length(mm)
249 ‰ � 238 270 206 ‰ � 206 231
Length to ride hight
adjuster (mm)
28 ‰ � 55 7 44 ‰ � 60 1
Lever ratio 1.00 1.26
* Refer to the above explanation *3 of ride height information for drivable high and low limitations.

Test vehicle information
  F R
Vehicle weight kg - -
Tire size (Air pressure) kPa 235 / 45 - 17 ( 230 ) 235 / 45 - 17 ( 220 )
Wheel size 8.0 JJ ÌÑ 17 inset 55 8.0 JJ ÌÑ 17 inset 55
Test data 0 mm / -2å¡30' 0 mm / -2å¡18'
Standard value IN * å± * mm / -*å¡**' å± **' IN * å± * mm / -*å¡**' å± **'
* Test data at HKS.

Parts List * It may be changed without prior notice.

‰ÛÏNatural steering feeling‰۝ so that a driver can trace the line as desired was pursued as STI‰۪s unique handling characteristic.
Focusing on driving stability during cornering to match the vehicle‰۪s characteristics, the helper springs in the front and rear maintain the stroke amount on the extension side so the tires can continuously contact even on rough road surfaces.
Management of VPS improves the driving comfort and sportiness. Driving comfort can be maintained under long-distance driving much better than the stock suspension.
Utilizing the helper springs in both front and rear dampers enables to secure the stroke of the extension side as possible. 
The default setting is the dial 15 so the suspension can actively work. For highly stability, set the dial to 20 to 25.
The alignment data shows the value when the camber adjusting bolt under the front strut is turned to the full negative side.
Compatibility with WRX was confirmed by actual fitting.
* This product was tested in the U.S.

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