SKU: 191435698

HKS Max 4 SP AP1/AP2 Full Kit

Sale price$810.00 Regular price$900.00
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USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Aug 17 - Aug 22

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Description

HKS Max 4 SP AP1/AP2 Full KitSingle Tube Damper Design Mono tube dampers allow for more accurate and stable control and adjustment of dampening. Lower ride height and center of gravity gives a more stable ride. Dust Boot Protect the shaft from the flying stones. PNE Coating Using this special surface coating provides 5 times better durability over standard galvanising. This prevents build up around the threads of the adjustment areas allowing for easier height adjustment. M Shaft

Single Tube Damper Design

  • Mono tube dampers allow for more accurate and stable control and adjustment of dampening. Lower ride height and center of gravity gives a more stable ride.

Dust Boot

  • Protect the shaft from the flying stones.

PNE Coating

  • Using this special surface coating provides 5 times better durability over standard galvanising. This prevents build-up around the threads of the adjustment areas allowing for easier height adjustment.

M Shaft (?46 normal type)

  • With the new design of cylinder shaft since the HIPERMAX M-1, MAX IV increased the cylinder shaft size to have a firm damping even at a little stroke range by optimizing the oil pressure characteristic. We mainly adopted this to the rear damper that can have a better driving experience.

Adopted Pillow Ball Upper Mount

  • For more accurate and sharp steering.

New Design Needle

  • Newly designed needle has been used to revise the very low speed and middle and high speed dampening which is key to a comfort ride.

Reduction of Unsprung Weight

  • In order to reduce unsprung weight, bracket, ride height adjusters and lock nuts are made from aluminium. (Not for all vehicles)

30 Step Damping Force Adjustment

  • 30 levels of dampening adjustment allow fine tune adjustment for street, circuit winding roads, highway, or the weight of the vehicle.

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 Normal Normal
Damper/Spring layout Coilover Coilover
Spring rate change at factory Possible Possible
Damping force adjustment with wire - ? ?5
Helper spring
(Spring rate N/mm)
? ( 19.8 ) ? ( 19.8 )

Kit Information

  • Spring of Full Kit
  F R
Spring rate N/mm(kgf/mm) 157 ( 16 ) 157 ( 16 )
Free height (mm) 170 150
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* 2000 / 500 1400 / 600
Default position of dial 15 15
Remaining damper stroke (Rebound/Damping)mm 38 / 47 50 / 50
  • Setting Data
  F R
Default Test Drivable limit
High *
Drivable limit
Low *
Default Test Drivable limit
High *
Drivable limit
Low *
Length of
case (mm)
410 ? 438 405 292 ? 269 282
Spring
Set length(mm)
L:212 / R:208 ? ? L:224 / R:220 208 ? ? 223
Length to ride hight
adjuster (mm)
L:65 / R:69 ? L:93 / R:97 L:48 / R:52 37 ? 60 12
Lever ratio 1.50 1.49
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 191435698

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Ally
Waukegan, US
★★★★★ 2
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Size: 8, Color: Chestnut
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Reviewed in the United States on May 6, 2026
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Bonnie
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They are so comfortable and stylish. I’m a size 8.5 and went with a size 8. Great value! Go get some I also got them in a tan color. Love them!
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Reviewed in the United States on May 18, 2026
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Sierra Schafer
Carnegie, US
★★★★★ 5
Very Comfortable
Size: 9, Color: Chestnut, Size: 9, Color: Chestnut
Good quality and very comfortable. Sizing is accurate.
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Reviewed in the United States on April 8, 2026
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CrisJoy
Belleville, US
★★★★★ 4
Cute - change footbed please
Size: 8.5, Color: Dense Smoke
These are so comfy and fit my usually 8.5 foot great. It's the footbed of UGGs that I keep hoping they'll change. It's like our memory foam mattress - cushy and great UNTIL THE HEAT comes! Then it's a no for this hot 65 yo G'ma!
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Reviewed in the United States on May 20, 2026
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maria cano
Charlottesville, US
★★★★★ 3
No me quedaron
Size: 8, Color: Dense Smoke
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Reviewed in the United States on April 7, 2026

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