{"product_id":"icon-vehicle-dynamics-2007-2021-toyota-tundra-stage-1-s2-secondary-sho","title":"ICON Vehicle Dynamics 2007-2021 Toyota Tundra Stage 1 S2 Secondary Shock Upgrade System","description":"\u003cp class=\"product-lead\"\u003eThe ICON Vehicle Dynamics Stage 1 S2 Secondary Shock Upgrade System adds a vehicle-specific 2.5 Series piggyback reservoir secondary shock to an existing ICON coilover setup on 2007–2021 Toyota Tundra trucks, effectively doubling the front suspension's damping capacity for more confident performance over rough terrain. Note that welding is required at the lower control arm during installation.\u003c\/p\u003e\n\u003cp class=\"product-shipping-note\"\u003e\u003cstrong\u003eShipping:\u003c\/strong\u003e ICON parts ship direct from ICON Vehicle Dynamics, mostly by UPS Ground. Lead times vary by part and some items are built to order, so please allow extra time. We email tracking as soon as your order ships.\u003c\/p\u003e\n\n\u003ch2\u003eDoubled Damping Without a Long-Travel Overhaul\u003c\/h2\u003e\n\u003cp\u003eAdding a secondary shock alongside an existing ICON coilover means the front suspension has twice the damping oil volume and twice the damping force available when it matters most: on washboard roads, over large obstacles, or during high-speed desert running. That increase in damping ability translates directly to better vehicle stability both off-road and on, without the cost or complexity of a full long-travel conversion.\u003c\/p\u003e\n\n\u003ch2\u003eModular Design, Mostly Bolt-On Installation\u003c\/h2\u003e\n\u003cp\u003eThe S2 system is built around billet aluminum shock tower adapters, fabricated shock hoops, and steel lower shock mounts. It retains the factory lower control arms and maintains OE track width, so no geometry recalibration is required after installation. The modular approach lets Tundra owners add the secondary shock now and continue upgrading in stages rather than committing to a complete system rebuild at once. One lower control arm weld point is required; plan for that step before starting the install.\u003c\/p\u003e\n\n\u003ch2\u003eFully Rebuildable 2.5 Series Shocks\u003c\/h2\u003e\n\u003cp\u003eThe included 57722P 2.5 Series VS piggyback reservoir shocks are vehicle-specifically tuned for the Tundra application. Both shocks are fully rebuildable and revalveable, so valving can be adjusted for changing terrain preferences or the shocks can be serviced after high-mileage use rather than replaced outright.\u003c\/p\u003e\n\n\u003ch2\u003eFeatures\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e2.5 Series VS piggyback reservoir secondary shocks:\u003c\/strong\u003e vehicle-specifically tuned, increased damping and oil volume over a single-shock setup\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBillet aluminum shock tower adapters:\u003c\/strong\u003e included for a precise, repeatable fit\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFabricated shock hoops and steel lower mounts:\u003c\/strong\u003e included hardware for a complete secondary-shock installation\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFactory lower control arm retention:\u003c\/strong\u003e maintains OE track width with no geometry changes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFully rebuildable and revalveable shocks:\u003c\/strong\u003e serviceable in the field or at a shop\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eModular upgrade path:\u003c\/strong\u003e compatible with a staged build rather than requiring a full system swap\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eSpecification\u003c\/th\u003e\n      \u003cth\u003eDetail\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eVehicle Fitment\u003c\/td\u003e\n      \u003ctd\u003e2007–2021 Toyota Tundra\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eShock Series\u003c\/td\u003e\n      \u003ctd\u003e2.5 Series VS piggyback reservoir\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eComponents Included\u003c\/td\u003e\n      \u003ctd\u003e56109 S2 Hoop Kit (qty 1), 57722P 2.5 VS Piggyback Shock Pair (qty 1)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eShock Serviceability\u003c\/td\u003e\n      \u003ctd\u003eFully rebuildable and revalveable\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eOEM Wheel\/Tire Compatibility\u003c\/td\u003e\n      \u003ctd\u003eYes\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eRecommended Aftermarket Tire\u003c\/td\u003e\n      \u003ctd\u003e35 x 12.50 in (larger sizes may require fender trimming)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eSKU\u003c\/td\u003e\n      \u003ctd\u003eK53151\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eShip Weight\u003c\/td\u003e\n      \u003ctd\u003e52 lb\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWho This Is For and Isn't\u003c\/h2\u003e\n\u003cp class=\"product-fit-yes\"\u003eThis system suits 2007–2021 Toyota Tundra owners who already run an ICON coilover setup on the front suspension and want to add meaningful damping capacity for off-road use without converting to a full long-travel kit. It is a good fit for a staged build where the owner plans to upgrade incrementally.\u003c\/p\u003e\n\u003cp class=\"product-fit-no\"\u003eThis system is not compatible with any other aftermarket suspension kit and must not be used in conjunction with non-ICON setups. An existing ICON coilover is required; this is not a stand-alone suspension system. Installation requires welding at the lower control arm; it is not a fully tool-free or drill-free install.\u003c\/p\u003e\n\n\u003ch2\u003eCommon Questions\u003c\/h2\u003e\n\u003ch3 class=\"product-faq-q\"\u003eDoes this system work without an existing ICON coilover already installed?\u003c\/h3\u003e\n\u003cp class=\"product-faq-a\"\u003eNo. The Stage 1 S2 Secondary Shock Upgrade System is designed to add a secondary shock to an existing ICON coilover setup on 2007–2021 Toyota Tundra trucks. It is not a stand-alone suspension system and must not be used in conjunction with any other aftermarket suspension kit.\u003c\/p\u003e\n\u003ch3 class=\"product-faq-q\"\u003eIs welding required to install this system?\u003c\/h3\u003e\n\u003cp class=\"product-faq-a\"\u003eYes. The S2 Secondary Shock Upgrade System requires welding at the lower control arm. Plan for this step before beginning the installation; the system is otherwise a mostly bolt-on upgrade using the included billet aluminum shock tower adapters, fabricated shock hoops, and steel lower shock mounts.\u003c\/p\u003e\n\u003ch3 class=\"product-faq-q\"\u003eWill the S2 system change the Tundra's track width or require new control arms?\u003c\/h3\u003e\n\u003cp class=\"product-faq-a\"\u003eNo. The S2 Secondary Shock Upgrade System retains the factory lower control arms and maintains OE track width, so no geometry recalibration is needed after installation on 2007–2021 Toyota Tundra trucks.\u003c\/p\u003e\n\u003ch3 class=\"product-faq-q\"\u003eCan the included shocks be rebuilt or revalved after extended use?\u003c\/h3\u003e\n\u003cp class=\"product-faq-a\"\u003eYes. The 2.5 Series VS piggyback reservoir shocks included in the S2 system are fully rebuildable and revalveable, allowing valving to be adjusted for different terrain preferences or the shocks to be serviced after high-mileage use rather than replaced.\u003c\/p\u003e\n\u003ch3 class=\"product-faq-q\"\u003eWhat tire size is recommended with this system?\u003c\/h3\u003e\n\u003cp class=\"product-faq-a\"\u003eThe Stage 1 S2 system on the 2007–2021 Toyota Tundra is designed around a 35 x 12.50 inch tire. Larger tires may fit but could require fender trimming and additional modifications.\u003c\/p\u003e","brand":"ICON Vehicle Dynamics","offers":[{"title":"Default Title","offer_id":50630764232774,"sku":"K53151","price":2020.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0691\/2203\/1686\/files\/44c8f56d22f92e8ac5ae2e567f0d592f-sq.jpg?v=1791961201","url":"https:\/\/terrainvault.com\/products\/icon-vehicle-dynamics-2007-2021-toyota-tundra-stage-1-s2-secondary-sho","provider":"TerrainVault","version":"1.0","type":"link"}