HKS MAX 4 SP 14-21 SUBARU WRX STI FULL KIT
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HKS MAX 4 SP 14-21 SUBARU WRX STI FULL KIT
The sport model to have a comfortable drive even in the winding road.     The model in the photo is VAB.     Application Engine FA20(TURBO) Model Year 14/08 - 21/03 Remarks Specification   FRONT REAR Damping force adjustment 30 steps 30 ...
HKSHKS MAX 4 SP 14-21 SUBARU WRX STI FULL KIT
HKS MAX 4 SP 14-21 SUBARU WRX STI FULL KIT

HKS

HKS MAX 4 SP 14-21 SUBARU WRX STI FULL KIT

$2,480.00 CAD
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Description

The sport model to have a comfortable drive even in the winding road.

 

 

The model in the photo is VAB.

 

 

Application

Engine FA20(TURBO)
Model Year 14/08 - 21/03
Remarks

Specification

  FRONT REAR
Damping force adjustment 30 steps 30 steps
Base valve - -
Height adjustable lower bracket
Upper mount Spherical bearing Spherical bearing
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)
○ ( 19.8 ) ○ ( 19.8 )
Ride Heightmm
  Factory *2 Test data Adjustable range
High - Low *3
Drivable range
High - Low *4
FRONT Ride height *1 651 675 ~ 623 675 ~ 630
Against stock -24 0 ~ -54 0 ~ -45
REAR Ride height *1 663 679 ~ 610 679 ~ 619
Against stock -16 0 ~ -69 0 ~ -60

*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) 118 ( 12 ) 98 ( 10 )
Free height (mm) 170 170
Spring type Straight 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* 1991 / 373 726 / 147
Default position of dial 15 15
Remaining damper stroke (Rebound/Damping)mm 55 / 58 52 / 64

* 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)
271 295 271 249 262 235
Spring
Set length(mm)
220 220 241 223 223 244
Length to ride hight
adjuster (mm)
53 77 32 42 55 7
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 × 17 inset 55 8.0 JJ × 17 inset 55
Alignment
(Toe/Camber)
Test data 0 mm / -4°00' 0 mm / -2°18'
Standard value IN * ± * mm / -*°**' ± **' IN * ± * mm / -*°**' ± **'

* Test data at HKS.


Parts List  * It may be changed without prior notice.

 


Point

・Set up for driving in the circuit with high grip radial tire. For sporty drive set up dial at F-10 to 15 and R-15. For street drive set up dial at F-20 and R-20.
・We get rid of front damper's thrust feeling at turn-in and give mild and natural steering feeling.
・When approaching corner without braking, you can control rear tire surface pressure by accelerator-off timing and adjusting to have small over steering.
・Can have traction by transferring weight to rear side from the mid RPM boost. It will have sharp acceleration without push-under by link between fast acceleration-on with not moving steering for rear kick-start.
・It has helper spring in the front and rear for it could be impossible to have enough stroke without high rate helper. Therefore they grasp the street surface for stable traction and safe braking.
・Please be careful inside rim or side wall for interfering when having big tires because the front damper spring and ride are very close to tires.
・We set the short stabilink together for front. However if you make the front case longer than 274mm, please use the stock stabilink.
・The alignment data for lower camber adjusting bolt of front strut to the maximum negative, and also upper adjustment is set to maximum negative side.
・Tire sizes are 265/35-18 high grip radial for circuit test.

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Application List
ImageSKU / Part NoApplicationDetail
 80250-AF003Subaru Impreza (2014-2021) - WRX/WRX STI
 80250-AF003Subaru WRX (2014-2021)
 80250-AF003Subaru WRX STI (2014-2021)
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