HKS

HKS MAX IV-SP Coilover Kit - Subaru WRX/STI 2015 - 2021

$2,625.00

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MFG: 80250-AF003

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

The model in the photo is VAB.

Application

Engine	FA20(TURBO)
Model Year	14/08 - 21/03
Remarks

Specification

	FRONT	REAR
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 Heightmm

		Factory *2	Test data	Adjustable range High - Low *3	Drivable range High - Low *4
FRONT	Ride height *1	651	←	675 ～ 623	675 ～ 630
FRONT	Against stock	-24	←	0 ～ -54	0 ～ -45
REAR	Ride height *1	663	←	679 ～　610	679 ～　619
REAR	Against stock	-16	←	0 ～ -69	0 ～ -60

*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	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*	1991 / 373	726 / 147
Default position of dial	15	15
Remaining damper stroke (Rebound/Damping)mm	55 / 58	52 / 64

* 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)	271	←	295	271	249	←	262	235
Spring Set length(mm)	220	←	220	241	223	←	223	244
Length to ride hight adjuster (mm)	53	←	77	32	42	←	55	7
Lever ratio	1.00				1.26

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

Test vehicle information

		F	R
Vehicle weight kg		-	-
Tire size (Air pressure) kPa		235 / 45 - 17 ( 230 )	235 / 45 - 17 ( 220 )
Wheel size		8.0 JJ × 17 inset 55	8.0 JJ × 17 inset 55
Alignment (Toe/Camber)	Test data	0 mm / -4°00'	0 mm / -2°18'
Alignment (Toe/Camber)	Standard value	IN * ± * mm / -°' ± *'	IN * ± * mm / -°' ± *'

* Test data at HKS.

Parts List * It may be changed without prior notice.

HKS MAX IV-SP Coilover Kit - Subaru WRX/STI 2015 - 2021

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