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ICON Vehicle Dynamics K53121 Stage 1 S2 Secondary Shock Upgrade System for Toyota 4Runner/FJ Cruiser

(2010-2021 Toyota 4Runner; 2010-2014 Toyota FJ Cruiser; 1989-1994 Toyota Pickup; 1990-1993 Volvo 240; 1975-1989 Volvo 244; 1975-1989 Volvo 245 + 4 more models)

Manufacturer

Picture for manufacturer ICON Vehicle Dynamics

Part Number

K53121
14 reviews
Sale Price

$2,153.68

Estimated ship date Sunday, November 22

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No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The ICON Vehicle Dynamics K53121 S2 Secondary Shock System transforms the off-road capability of 2010-2024 Toyota 4Runner and 2010-2014 Toyota FJ Cruiser vehicles by adding secondary shocks to existing ICON coilover setups. This affordable alternative to expensive long travel kits effectively doubles your suspension's damping ability, allowing you to tackle rougher terrain and larger obstacles with confidence.

Key Features:

  • Vehicle-specific tuned 2.5 Aluminum Series secondary shocks with remote reservoirs for increased damping and oil volume
  • One-piece impact extruded aluminum shock cylinders provide excellent corrosion resistance and consistent finish
  • Utilizes factory lower control arms and maintains OE track width for straightforward installation
  • Includes billet aluminum shock tower adapters, fabricated shock hoops, and steel skid plates with integrated shock mounts
  • Modular design allows for staged upgrades or complete installation at once
  • 100% removable components with no permanent frame modifications required
  • Skid plates can be installed standalone to protect factory lower control arms from trail damage

Performance Benefits:

  • Drastically improved vehicle damping ability in off-road conditions
  • Enhanced vehicle stability during on-road driving
  • Increased suspension capacity for demanding terrain and obstacle navigation

This Stage 1 upgrade system represents ICON Vehicle Dynamics' commitment to exceptional build quality and practical engineering, delivering professional-grade off-road performance without the complexity of major suspension overhauls.

California Prop 65 Warning: This product contains chemicals known to the State of California to cause cancer, and birth defects or other reproductive harm.

Products specifications

Fits

2010-2021 Toyota 4Runner; 2010-2014 Toyota FJ Cruiser; 1989-1994 Toyota Pickup; 1990-1993 Volvo 240; 1975-1989 Volvo 244; 1975-1989 Volvo 245; 1975-1984 Volvo 242; 1976, 1978-1981 Volvo 262; 1976-1982 Volvo 264; 1976-1981 Volvo 265

Bushings Included

No

Cylinder Material

Steel

Shaft Material

Chrome

Cylinder Diameter

2.5

Cylinder Color

Silver

Shocks Included

Yes

Shaft Diameter

7/8

Prop 65

WARNING: This product contains chemicals known to the State of California to ca

Lower Mount Type

Eyelet

SHOCK MOUNTS INCLUDED

Yes

Recommended Aftermarket Wheels

ICON Alloys | 20x9" w/ 5” Backspace / 0mm Offset

Mounting Hardware Included

Yes

Recommended Aftermarket Tires

33" x 11.50" (Larger tires may fit but fender trimming and modifications will be required.)

Damping Type

Oil

Gas Charged

Yes

Shaft Diameter

0.875

Cylinder Material

Aluminum

OEM Wheels & Tires Fitment

Yes

Recommended Aftermarket Wheels

ICON Alloys | 17x8.5" w/ 4.75” Backspace / 0mm Offset

Add-On Part

252012 - -4 TO -10 HOSE SHIELD KIT

Add-On Part

252008 - 2.5 X 13 SHOCK BOOT BLACK (PAIR)

Adjustable

No

Recommended Aftermarket Wheels

ICON Alloys | 18x9" w/ 5” Backspace / 0mm Offset

Upper Mount Type

Eyelet

Grade Type

Performance

Easy site to use.

I searched the web looking for the best prices on some spark plugs and Autoplicity was the cheapest. Thanks for the fast shipping.

Great

Best price on the web. Very fast and easy. Thank you!

Easy transaction, great price.

Hassle free!!!

I had a great experience ordering my springs through Autoplicity. I received instant notification of my order as it was placed. I was very happy to see shipping information so quickly after the order was placed, also. Last, but not least, I received the springs SO FAST! Best price, instant notification of order status, fastest shipping, therefore best review that I can write! Thanks, Autoplicity, I will be a return customer if I need anything else!

very good so far

Shipping took a little longer than quoted

Did not receive a confirmation email when I placed the order so I was unsure if if the order had gone through properly. Part shipped the day after I ordered it. I received three confirmation emails at the that time for some reason. Overall I would say the experience ordering from Autoplicity was excellent and inspired confidence.

Lets see how it goes

A bit pricier than other sites, but if you have the item in stock and I don't have to wait a month to get it.

Very quick performance on my phone.

Best price out there

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