Awesome control and comfort ride on the street for a sporty drive. The new Max IV sporty suspension.
Application
Specification
Engine
13B-REW
Model Year
91/12 - 02/08
Remarks
-
FRONT
REAR
Damping force adjustment
30 steps
30 steps
Base valve
-
-
Height adjustable lower bracket
○
○
Upper mount
Rubber
Rubber
Inverted/Normal type
Normal
Normal
Damper/Spring layout
Coilover
Coilover
Spring rate change at factory
Possible
Possible
Damping force adjustment with wire
-
-
Helper spring (Spring rate N/mm)
-
-
Ride Height
mm
Factory *2
Test data
Adjustable range High - Low *3
Drivable range High - Low *4
FRONT
Ride height *1
645
←
665 ~ 598
665 ~ 620
Against stock
-20
←
0 ~ -67
0 ~ -45
REAR
Ride height *1
653
←
677 ~ 591
677 ~ 619
Against stock
-24
←
0 ~ -86
0 ~ -58
*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)
78 ( 8 )
78 ( 8 )
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*
1353 / 363
1079 / 314
Default position of dial
15
15
Remaining damper stroke (Rebound/Damping)mm
45 / 55
44 / 56
* 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)
377
←
390
370
301
←
318
283
Spring Set length(mm)
190
←
←
200
194
←
←
200
Length to ride hight adjuster (mm)
74
←
87
57
74
←
91
50
Lever ratio
1.49
1.40
* Refer to the above explanation *3 of ride height information for drivable high and low limitations.
Parts List * It may be changed without prior notice.
Point
・This is set for city street drive. ・HKS has redesigned the M shaft and inside of the damper that has improved driving experience and handling by pulling up damping fast from the start. ・The new design of rear upper plate give more adherence to the body. ・The recommended setting for dial is 15 step for both front and back. If you want more comrfortable setting, set it to 25 to 30 step. ・MAX IV can handle from city street to winding roads.
For over 40 years, HKS products have been put to the test in drag racing, road racing, rallying, and top speed trials. HKS equipped vehicles have captured numerous racing championships and hold claim to a myriad of competition records using many “off the shelf”, race proven HKS components. As a result, HKS has been synonymous with “performance” in the automotive aftermarket industry for the past 40+ years.
This product is compatible with the following vehicles
Vehicle Make
Vehicle Model
Vehicle Variant
From
To
Engine
Notes
Mazda
RX7
13B-REW Twin Turbo
1991
2002
RE13B
1.3L - RWD Petrol
Whether it is engine, exhaust, suspension, or drive-train systems, there is no substitute for the performance, quality and reliability of HKS. Part-Box/Co-ordSport are an approved distributor for HKS performance and tuning products.
For over 35 years, HKS products have been put to the test in drag racing, road racing, rallying, and top speed trials. HKS equipped vehicles have captured numerous racing championships and hold claim to a myriad of competition records using many “off the shelf”, race proven HKS components. As a result, HKS has been synonymous with “performance” in the automotive aftermarket industry for the past 35+ years.