MAX IV GT
IMPREZA WRX STI
IMPREZA WRX STI GDB

MAX IV GT

Code No. 80230-AF003

*Discontinued.

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

 

 

▲The above photo is an item for GDB.

 

 

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 Rubber Rubber
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)
- ○ ( 19.8 )
Ride Height mm
  Factory *2 Test data Adjustable range
High - Low *3
Drivable range
High - Low *4
FRONT Ride height *1 660 693 ~ 637 693 ~ 643
Against stock -33 0 ~ -56 0 ~ -50
REAR Ride height *1 655 655 ~ 568 655 ~ 579
Against stock -12 -12 ~ -99 -12 ~ -88

*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) 59 ( 6 ) 29 ( 3 )
Free height (mm) 220 250
Spring type Straight Barrel type 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* 1515 / 412 441 / 157
Default position of dial 15 15
Remaining damper stroke (Rebound/Damping)mm 49 / 50 85 / 84

* 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)
284 302 284 391 391 365
Spring
Set length(mm)
205 193 220 280 280 324
Length to ride hight
adjuster (mm)
88 118 73 151 151 81
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 / -1°48' 0 mm / -2°00'
Standard value 0 ± 3 mm / -0°30' ± 45' 0 ± 3 mm / -1°40' ± 45'

* Test data at HKS.


Parts List  * It may be changed without prior notice.

 


Point

・We made the suspension more comfortable to ride with by making the weight more movable.
・Usually the rear will have a bad movement if the vehicle height lowered, but with the new 3 kg, it has a wonderful feeling.
・We have set it not to push up even at a big ramp.
・The damper will move aggressively even in the rough streets to make tires to contact the ground, therefore it will run fine on any kinds of roads.
・We set it mild to have a comfortable long distance drive and also have a comfortable ride for the passenger.
・Recommended dial setting for both front and rear is 15.(factory setting)
・It’s not only soft, but also it can have a sporty driving that have the weight shift by accelerator control or for a full rear traction.
・The data other than testing is calculated numbers.(It's not guaranteeing the actual number of vehicle height)
 
 
 



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