HKS Hipermax IV GT Suspension Toyota GT86 & Subaru BRZ

Application

Specification

Engine

FA20

Model Year

12/04 -

Remarks

Applied E, GT”Limited”, Manual transmission

FRONT

REAR

Damping force adjustment

30 steps

30 steps

Base valve

-

-

Height adjustable lower bracket

○

○

Upper mount

Spherical bearing

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 )

Ride Height

mm

Factory *2

Test data

Adjustable range
High - Low *3

Drivable range
High - Low *4

FRONT

Ride height *1

654

642

670 ～ 610

670 ～ 620

Against stock

-16

-28

0 ～ -60

0 ～ -50

REAR

Ride height *1

657

645

671 ～ 592

671 ～ 596

Against stock

-14

-26

0 ～ -79

0 ～ -75

*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 )

38 ( 4 )

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*

900 / 300

720 / 150

Default position of dial

15

15

Remaining damper stroke (Rebound/Damping)mm

41 / 46

53 / 47

* 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)

230

220

245

204

265

254

276

234

Spring
Set length(mm)

164

←

164

170

189

←

189

206

Length to ride hight
adjuster (mm)

47

37

62

15

51

40

62

3

Lever ratio

1.06

1.28

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

Test vehicle information

F

R

Vehicle weight kg

0

0

Tire size (Air pressure) kPa

215 / 45 - 17 ( 240 )

215 / 45 - 17 ( 240 )

Wheel size

7.0 JJ × 17 off +48

7.0 JJ × 17 off +48

Alignment
(Toe/Camber)

Test data

0 mm / -1°12'

IN 1 mm / -2°24'

Standard value

0 ± 3 mm / 0°00' ± 45'

IN 2 ± 3 mm / -1°12' ± 45'

* Test data at HKS.

Parts List * It may be changed without prior notice.

Point

This is the street version damper for 86/BRZ.
Although this is a product designed for comfort and stylish appearance it is able to hold its own with regards to road performance. 18 inch tires were chosen for settings.
This product is recommended to those who would use the vehicle daily and look for better ride comfort as much as possible for both drivers and passengers and who want to reduce arch gap or lower the vehicles' height. This damper has been developed to provide high ride quality through its supple yet stable setup. Once out at the race track, a twist of the adjustment dials can provide the performance necessary to enjoy the circuit.
Max 4 dampers utilize analysis data and perform tests on each vehicle to determine not just spring and damper rate, but also front/rear balance and stroke for people to enjoy this product safely. The concept is to try and se...