{"product_id":"icon-v-s-2-5-aluminum-rear-piggyback-shocks-for-2004-2026-ford-f-150","title":"ICON V.S. 2.5 Aluminum Rear Piggyback Shocks for 2004-2026 Ford F-150","description":"\u003cp class=\"product-lead\"\u003eThe ICON Vehicle Dynamics V.S. 2.5 Aluminum Series rear shock absorbers with piggyback reservoir and CDXS are application-specific performance shocks for 2009–2026 Ford F-150 and 2004–2008 Ford F-150 4WD, supporting 0–1 inch of rear lift over stock. Sold as a pair, each shock is built around a 2.5-inch hard-anodized aluminum body, a nitrogen-charged monotube design, and ICON's Compression Damping Dual Speed valving for independent high- and low-speed compression adjustment.\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\u003eTuned for the Application, Not the Category\u003c\/h2\u003e\n\u003cp\u003eUnlike generic replacement shocks, the V.S. 2.5 Series is length- and valving-tuned for the specific F-150 application. That means the damping curve is calibrated for the truck's actual suspension geometry and weight, so the shock works as intended from the first mile rather than requiring extensive trial-and-error adjustment. Vehicle-specific valving also means the shock does not have to compromise between ride quality and off-road control the way a universal-fit unit does.\u003c\/p\u003e\n\n\u003ch2\u003eCDXS Dual-Speed Compression Adjustment\u003c\/h2\u003e\n\u003cp\u003eThe CDXS system controls fluid flow under compression with two independent adjustment knobs: one for high-speed compression and one for low-speed compression, each with 10 detented settings. Low-speed adjustment governs body roll and handling response during cornering and braking; high-speed adjustment governs harshness over sharp impacts and rough terrain. Being able to set them independently means a driver can tune for a firm, controlled highway feel without sacrificing compliance over rocks or washboard.\u003c\/p\u003e\n\n\u003ch2\u003eInternal Bump Zone and Piggyback Reservoir\u003c\/h2\u003e\n\u003cp\u003eA 6061 billet aluminum manifold positioned below the top cap creates an internal Bump Zone that adds 20 percent of damping force as the shock approaches full compression. This progressive resistance helps prevent harsh bottom-outs during high-velocity compression without stiffening the shock throughout its normal travel range. The piggyback reservoir increases fluid volume, which improves heat dissipation and reduces shock fade during sustained off-road use where a standard shock body would overheat and lose consistency.\u003c\/p\u003e\n\n\u003ch2\u003eFeatures\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCDXS Dual-Speed Compression:\u003c\/strong\u003e 10 detented settings each for independent high- and low-speed compression adjustment\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInternal Bump Zone:\u003c\/strong\u003e 6061 billet aluminum manifold adds 20% damping force near full compression to resist bottom-outs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePiggyback Reservoir:\u003c\/strong\u003e Nitrogen-charged monotube with external reservoir for improved heat dissipation and fade resistance\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e7\/8\" Shock Shaft:\u003c\/strong\u003e Induction-hardened, chrome-plated for durability and consistent seal performance\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e100% Rebuildable and Revalveable:\u003c\/strong\u003e Hard-anodized one-piece aluminum cylinder with PTFE-lined spherical bearings and application-specific mounting hardware\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e5WT Shock Oil:\u003c\/strong\u003e Premium-grade fluid for consistent damping across a wide temperature range\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\u003eSKU\u003c\/td\u003e\n      \u003ctd\u003e97720XP\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eBody Diameter\u003c\/td\u003e\n      \u003ctd\u003e2.5 in\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eShock Shaft Diameter\u003c\/td\u003e\n      \u003ctd\u003e7\/8 in\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eBody Material\u003c\/td\u003e\n      \u003ctd\u003eHard-anodized impact-extruded 6061 aluminum\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eCharge\u003c\/td\u003e\n      \u003ctd\u003eNitrogen-charged monotube\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eReservoir\u003c\/td\u003e\n      \u003ctd\u003ePiggyback\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eAdjustment\u003c\/td\u003e\n      \u003ctd\u003eCDXS dual-speed compression (10 detents high-speed, 10 detents low-speed)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eShock Oil\u003c\/td\u003e\n      \u003ctd\u003ePremium-grade 5WT\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eQuantity\u003c\/td\u003e\n      \u003ctd\u003ePair (2 shocks)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eShipping Weight\u003c\/td\u003e\n      \u003ctd\u003e22 lb\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eVehicle Fitment\u003c\/td\u003e\n      \u003ctd\u003e2009–2026 Ford F-150; 2004–2008 Ford F-150 4WD\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003ePosition\u003c\/td\u003e\n      \u003ctd\u003eRear\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eLift Range\u003c\/td\u003e\n      \u003ctd\u003e0–1 in over stock (most F-150 models)\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\"\u003eThese shocks suit 2009–2026 Ford F-150 owners and 2004–2008 Ford F-150 4WD owners running 0–1 inch of rear lift over stock who want independent dual-speed compression tuning, a rebuildable shock body, and improved fade resistance for sustained off-road use.\u003c\/p\u003e\n\u003cp class=\"product-fit-no\"\u003eThese shocks do not fit the F-150 Tremor, F-150 Raptor, or any F-150 equipped with the factory electronically controlled suspension system. They are also not compatible with models equipped with the BlueCruise system. They are not designed for rear lift exceeding 1 inch over stock.\u003c\/p\u003e\n\n\u003ch2\u003eCommon Questions\u003c\/h2\u003e\n\u003ch3 class=\"product-faq-q\"\u003eWhat Ford F-150 years and configurations do these shocks fit?\u003c\/h3\u003e\n\u003cp class=\"product-faq-a\"\u003eThese ICON V.S. 2.5 Aluminum rear shocks fit 2009–2026 Ford F-150 (all drive configurations except those noted below) and 2004–2008 Ford F-150 4WD models. They do not fit the F-150 Raptor, F-150 Tremor, or any F-150 with factory electronically controlled suspension or the BlueCruise system.\u003c\/p\u003e\n\u003ch3 class=\"product-faq-q\"\u003eHow much lift do these shocks support?\u003c\/h3\u003e\n\u003cp class=\"product-faq-a\"\u003eThe ICON V.S. 2.5 Aluminum rear shocks are calibrated for 0–1 inch of rear lift over stock on most F-150 models. Lift heights are measured from a stock-equipped vehicle baseline; they are not designed for applications exceeding 1 inch of rear lift.\u003c\/p\u003e\n\u003ch3 class=\"product-faq-q\"\u003eWhat does CDXS adjustment actually control?\u003c\/h3\u003e\n\u003cp class=\"product-faq-a\"\u003eCDXS (Compression Damping Dual Speed) provides two independent adjustment knobs on each shock: one for high-speed compression and one for low-speed compression, each with 10 detented positions. Low-speed controls body roll and handling response; high-speed controls harshness over sharp impacts. Adjusting them independently lets the driver tune street manners and off-road compliance separately.\u003c\/p\u003e\n\u003ch3 class=\"product-faq-q\"\u003eAre these shocks rebuildable?\u003c\/h3\u003e\n\u003cp class=\"product-faq-a\"\u003eYes. The ICON V.S. 2.5 Aluminum Series shocks are 100% rebuildable and 100% revalveable. The hard-anodized one-piece aluminum cylinder, PTFE-lined spherical bearings, and threaded body construction are all designed to be serviced rather than replaced as a unit.\u003c\/p\u003e\n\u003ch3 class=\"product-faq-q\"\u003eIs a California Proposition 65 warning applicable?\u003c\/h3\u003e\n\u003cp class=\"product-faq-a\"\u003eYes. These ICON shock absorbers contain chemicals known to the State of California to cause cancer, birth anomalies, or other reproductive harm. This warning applies to California residents under Proposition 65.\u003c\/p\u003e","brand":"ICON Vehicle Dynamics","offers":[{"title":"Default Title","offer_id":50631438303302,"sku":"97720XP","price":1613.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0691\/2203\/1686\/files\/5331262717948e322a351dea58ed260a-sq.jpg?v=1791965693","url":"https:\/\/terrainvault.com\/products\/icon-v-s-2-5-aluminum-rear-piggyback-shocks-for-2004-2026-ford-f-150","provider":"TerrainVault","version":"1.0","type":"link"}