SKU: 85535528333

HKS Max 4 SP GDB (A-D) Full Kit

Sale price$1035.00 Regular price$1150.00
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Ships within 48 hours · Estimated delivery Aug 9 - Aug 14

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Description

HKS Max 4 SP GDB (A-D) 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 Inverted Inverted
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 )

Kit Information

  • Spring of Full Kit
  F R
Spring rate N/mm(kgf/mm) 118 ( 12 ) 98 ( 10 )
Free height (mm) 170 220
Spring type Straight Straight Barrel type
Recommended range to change spring rate N/mm(kgf/mm) ±20 ( 2 ) ?20 ( 2 )
  • Specification of damper
  F R
Damping force (Rebound/Damping)N* 1900 / 700 700 / 300
Default position of dial 15 15
Remaining damper stroke (Rebound/Damping)mm 40 / 47 68 / 91
  • Setting Data
  F R
Default Test Drivable limit
High *
Drivable limit
Low *
Default Test Drivable limit
High *
Drivable limit
Low *
Length of
case (mm)
289 ? 332 289 359 ? 386 351
Spring
Set length(mm)
208 ? 208 225 294 ? 294 294
Length to ride hight
adjuster (mm)
67 ? 110 50 103 ? 130 95
Lever ratio 1.10 1.08
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: 85535528333

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★★★★★ 5
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Reviewed in the United States on August 3, 2025
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bernadette pernotto
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★★★★★ 4
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Color: C-apricot, Size: 14 Inch
My Dell laptop is 9" wide & 14" long. I can only zip up the back partially with my laptop in the backpack. I don't add anything else that is heavy because I'm fearful it will break. I wish it was bigger. I can fit my Apple laptop in it but it is smaller.
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Reviewed in the United States on August 4, 2025
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Ashley Driggers
Waukegan, US
★★★★★ 5
Good Quality
Color: C-apricot, Size: 14 Inch
The quality of the backpack is very good. I like how it has a waterproof feeling fabric. I have used it for work and travel and it is excellent quality.
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Reviewed in the United States on February 12, 2026
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Tara S
Lake Worth, US
★★★★★ 5
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Color: Black Brown, Size: 17.3 Inch
This backpack is awesome it holds way more than I anticipated and is super cute. The quality seems to be good to what I can tell.
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Reviewed in the United States on August 16, 2025
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Teri Haselhorst
Louisville, US
★★★★★ 5
Classy!
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Reviewed in the United States on September 10, 2025

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