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Icon K53156 Stage 2 RXT Shock System for Toyota Tundra 2007-2021

Brand: Icon Vehicle Dynamics
Part Number: K53156
Product Type: Shock System
Vehicle Fitment: Toyota Tundra 2007-2021
Condition: New
Note 1: These are stand-alone kits and are not to be used in conjunction with any other aftermarket kits
Note 2: Shocks are fully serviceable. coilover heights indicated are for a stock equipped vehicle
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Was: $4,292.11
Sale: $2,789.87
Save: 35%
Save: $1,502.24

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The 2007-2021 Toyota Tundra is a very capable and versatile truck with features that make it suitable for use as everything from daily driver, to tow rig, to adventure vehicle and everything in between. From the brutal deserts of the southwest to the wooded trails of the east coast Icon suspension systems have been put to the test and performed flawlessly for this popular Toyota. Over the span of hundreds of hours in the shop and over a thousand miles in the dirt, ICON Vehicle Dynamics engineers have pushed this vehicle to extremes in order to develop the most sophisticated suspension components on the market. Unable to leave "well-enough" alone, Icon is aiming to raise the bar in Tundra performance with the introduction of the RXT rear suspension system.

Through an accelerated testing process dubbed the "Icon1K" R&D program, Icon has spent over a year pushing the Tundra to off-road extremes to identify limiting factors in OE components and further extrapolate performance out of this vehicle. In a push to provide unparalleled ride quality and vehicle dynamics for everything from high-speed desert running to off the grid expedition, the RXT rear suspension system was born. The RXT rear suspension system is a combination of an all-new Icon multi-rate leaf spring, a hydraulic rear bump stop kit, and three RXT-specific 2.5 Aluminum Series rear shock options. Installation of this system replaces the mentioned "limiting factors" and completely redefines the potential of the 2007-2021 Toyota Tundra with a 20% increase in wheel travel and the ability to adjust the leaf spring rate to compensate for varying vehicle setups.

System Components

  • 56108 (Qty: 1) | 07-21 Tundra rear hydraulic bump stop kit
  • 57823CP (Qty: 1) | 07-21 Tundra RXT rear 2.5 VS RR CDCV pair
  • 158509 (Qty: 2) | 07-21 Tundra multi rate RXT leaf pack w/ add in leaf
  • 52050 (Qty: 1) | Toyota rear 8.0" U-bolt kit


Icon RXT Multi-Rate Leaf Spring

  • 3 user-adjustable spring rates for unique vehicle configurations
  • Military wrap front eyelet for increased durability
  • Galvanized leaf separators reduce friction and aid in corrosion resistance
  • Leaf tip inserts reduce noise and increase ride comfort
  • Potential for increased wheel travel when used with RXT shock without sacrificing up-travel (up to 20% over stock)
  • "Icon 1K" tested under rigorous off-road conditions to validate tune, performance, strength, and durability
  • Direct bolt-in to OEM spring location makes for an easy install

Icon RXT Rear Shock

  • CDC valve technology allows for 10 settings of quick and easy compression damping adjustment
  • 10" aluminum reservoirs provide generous oil and nitrogen volume for consistent damping as shock temperature increases
  • Shocks are fully rebuildable and revalveable
  • Simple and straightforward installation
  • "Icon 1K" tested under rigorous off-road conditions to validate tune, performance, strength, and durability
  • Unique side-mounted lower eyelet allows for increased travel while utilizing factory mounting location
  • Corrosion resistant, one-piece impact extruded aluminum shock bodies with 7/8" shafts
  • Vehicle-specific tuned shocks provide increased damping and oil volume

Icon Hydraulic Rear Bump Stop Kit

  • 2.5" travel bump stop reduces rear end 'kick' and improves overall performance
  • Position sensitive technology exponentially increases bottom-out resistance
  • Vehicle specific bump stop tune to provide smooth engagement and best ride quality
  • Direct bolt-in to OEM bump stop location makes for an easy and straightforward install
  • Heavy duty 1.25" CNC machined nitro steel shaft
  • CAD plated body for maximum corrosion resistance
  • Double sealed high pressure Schrader valve
  • Operating range of 50-250 PSI
  • Replaceable noise-reducing striker pad
  • Fully serviceable
  • "Icon 1K" tested under rigorous off-road conditions to validate tune, performance, strength, and durability


  • Shock Series: 2.5 Aluminum Series
  • Position: Rear
  • Shaft Material: Chrome
  • Cylinder Material: Steel
  • Gas Charged: Yes
  • Mounting Hardware Included: Yes
  • Adjustable: No

Vehicle Fitment 

Year Make Model
2007-2021 Toyota Tundra

Technical Files 

57823CP_Installation Instructions

158509_Installation Instructions

56108_Installation Instructions

52050_Installation Instructions

Warranty Information



Shipping Information

  • Item Requires Shipping
  • 1.0 lbs.
  • W1.0000” x H1.0000” x L1.0000”
  • Free Shipping!
  • Free Shipping!

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