Explanation of the product Application chart

MAX IV SP Code No. 80250-AM002

▲The above photo is an item for CT9A.

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

Application   Specification
Engine 4G63(TURBO)
Model Year 05/09 - 07/09
Remarks Vehicle height data of CT9A
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 Height mm
  Factory *2 Test data Adjustable range
High - Low *3
Drivable range
High - Low *4
FRONT Ride height *1 656 694 ~ 611 662 ~ 611
Against stock -38 0 ~ -83 -32 ~ -83
REAR Ride height *1 629 666 ~ 625 666 ~ 625
Against stock -37 0 ~ -41 0 ~ -41
*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) 200 200
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* 2403 / 451 1638 / 265
Default position of dial 15 15
Remaining damper stroke (Rebound/Damping)mm 49 / 64 69 / 66
* 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)
284 284 266 379 394 376
Set length(mm)
249 244 273 267 255 267
Length to ride hight
adjuster (mm)
42 37 0 114 141 111
Lever ratio 1.08 1.35
* Refer to the above explanation *3 of ride height information for drivable high and low limitations.

Test vehicle information
  F R
Vehicle weight kg 889 570
Tire size (Air pressure) kPa 245 / 40 - 18 ( 220 ) 245 / 40 - 18 ( 220 )
Wheel size 9 JJ × 18 off 29 9 JJ × 18 off 29
Test data 0 mm / -2°00' in 2 mm / -2°42'
Standard value 0 ± 2 mm / -2°00' ± 30' in 3 ± 2 mm / -1°00' ± 30'
* Test data at HKS.

Parts List * It may be changed without prior notice.

・We have set it up mainly for sporty high-grip radial tires, but still it will have a comfortable ride for the city drive. It’s not very solid but flexible enough to have a good control.
・Both front and rear used the pillow upper, and adjustable front camber. Please adjust best setting for sport drive or check by how the tires wear out.
・We could have less weight by changing the both front and rear bracket to aluminum, same as the MAX IV GT which was steel originally.
・Our new design of needle which was first developed for MAX IV GT is used here too. It will improve ride comfort and control by having better performance of damping force in a low RPM.
・The high spring rate with helper spring will have enough stroke in the stretching side. They will have better road tracking, stability in an extreme situation and effective traction for the start.
・We recommend dial settings of F15 R15 for sport drive. If you like firm feeling, you can drive street as same as sport drive. But if you want more mild feeling, please try F25 and R40.
・We set at a lower vehicle height in rear at the fender. This is the best setting in means of handling and balance. The low height rate compared to stock setting is the same.
・If you want to raise the vehicle height from factory setting, first raise the ride-height spring rate then extend the total length. If you extend the total length first, the upper arm and damper might interfere with each other.
・Rear ride-height and arm are very close to each other, so they could easier interfere with each other. Therefore you can only lower 3mm of the factory setting.