Icon Vehicle Dynamics K53113 Secondary Shock System Lift 0-3.5" Lexus GX470/Toyota 4Runner/Tacoma/FJ Cruiser 03-15 Pair

ICON Vehicle Dynamics S2 Secondary Shock System

The ICON Vehicle Dynamics S2 Secondary Shock System allows installation of a secondary 2.5 Aluminum Series or Omega bypass shock to an existing ICON coilover setup for Toyota Tacoma (2005–2015), Toyota 4Runner (2003–2009) and Toyota FJ Cruiser (2007–2009). Adding a secondary shock doubles the suspension's damping capacity, improving off-road performance and vehicle stability while remaining a more affordable and less complex option than long-travel conversions.

The system uses factory lower control arms and maintains OE track width. Billet aluminum shock tower adapters, fabricated shock hoops, and steel skid plates with integrated shock mounts provide a largely bolt-on installation that avoids major frame or suspension modification. The kit is fully removable and modular, allowing staged upgrades or standalone skid plate protection for the lower control arms.

Key Features

• Improved damping: Drastically increases off-road damping ability
• Better stability: Enhances on-road stability
• Factory integration: Utilizes factory lower control arms and maintains OE track width
• Vehicle-specific tuning: Secondary shocks tuned for increased damping and oil volume
• 2.5 Aluminum Series: One-piece impact-extruded aluminum cylinders for corrosion resistance and consistent finish
• Omega Series: Two-tube bypass design with compression and rebound damping adjustment
• Serviceable: Shocks are fully rebuildable and revalveable
• Installation: Mostly bolt-on design for a straightforward install

Notes

• OEM wheels and tires fitment: Yes
• Recommended aftermarket wheels: ICON Alloys — 17x8.5 (4.75" backspace, 0mm offset); 18x9 (5.00" backspace, 0mm offset); 20x9 (5.00" backspace, 0mm offset)
• Recommended tire size: 33" x 11.50" (larger tires may fit but fender trimming and modifications will be required)
• Stand-alone kit — not to be used in conjunction with other aftermarket kits
• Shocks are fully serviceable; coilover heights indicated are for a stock-equipped vehicle
• Welding required on the lower control arm
• Not compatible with TRD big brake kit
• Not recommended with remote reservoir coilovers
• Maximum steering angle is reduced for secondary shock compatibility
• Not compatible with KDSS-equipped GX470s

Icon Vehicle Dynamics K53113 Secondary Shock System Lift 0-3.5" Lexus GX470/Toyota 4Runner/Tacoma/FJ Cruiser 03-15 Pair - Features