MAX IV GT 40th Limited
IMPREZA WRX STI
IMPREZA WRX STI GDB

MAX IV GT 40th Limited

Code No. 80230-AF003S

*Discontinued.

Application

Engine EJ20(TURBO)
Model Year 04/06 - 07/06
Remarks  

Specification

  FRONT REAR
Damping force adjustment 30 steps 30 steps
Base valve - -
Height adjustable lower bracket
Upper mount
Inverted/Normal type Inverted Inverted
Damper/Spring layout Coilover Coilover
Spring rate change at factory Possible Possible
Damping force adjustment with wire -
Helper spring
(Spring rate N/mm)
○(19.8N/mm) ○(19.8N/mm)
Ride Height mm
  Factory *2 Test data Adjustable range
High - Low *3
Drivable range
High - Low *4
FRONT Ride height *1 639 693 ~ 594 693 ~ 624
Against stock -54 0 ~ -99 0 ~ -69
REAR Ride height *1 635 667 ~ 568 667 ~ 625
Against stock -32 0 ~ -99 0 ~ -42

*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) 170 220
Spring type Straight Straight Barrel type
Recommended range to change spring rate N/mm(kgf/mm) ±20 ( 2 ) +20 ( 2 )

Specification of damper

  F R
Damping force (Rebound/Damping)N* 1900 / 700 700 / 300
Default position of dial 15 15
Remaining damper stroke (Rebound/Damping)mm 40 / 49 68 / 89

* 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)
289 338 289 345 375 343
Spring
Set length(mm)
201 215 284 284 294
Length to ride hight
adjuster (mm)
63 112 49 117 147 107
Lever ratio 1.10 1.08

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



Test vehicle information

  F R
Vehicle weight kg 897 (880) 612 (580)
Tire size (Air pressure) kPa 235 / 40 - 18 ( 220 ) 235 / 40 - 18 ( 220 )
Wheel size 8.5 JJ × 18 off 50 8.5 JJ × 18 off 50
Alignment
(Toe/Camber)
Test data 0 mm / -2°18' +2 mm / -1°47'
Standard value 0 ± 3 mm / -0°30' ± 45' 0 ± 3 mm / -1°40' ± 45'

* Test data at HKS.



Point

・We had many test drive and set it for street to circuit drive with high grip tire.
・We set damping force for the best driving & steering but also have the road holding without interfereing the suspension movement.
・The data other than testing is calculated numbers.(It's not guaranteeing the actual number of vehicle height)
 
 
 
 
 
 
 
 



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