{"product_id":"icon-v-s-2-5-aluminum-series-rear-shock-absorbers-for-1999-2026-ford-s","title":"ICON V.S. 2.5 Aluminum Series Rear Shock Absorbers for 1999-2026 Ford Super Duty, 3-6\" Lift, Pair","description":"\u003cp class=\"product-lead\"\u003eThe ICON V.S. 2.5 Aluminum Series Rear Shock Absorbers are a vehicle-specific, nitrogen-charged monotube pair built for 1999–2026 Ford Super Duty trucks running 3–6 inches of rear lift, sold as a matched set (SKU 37601P). Each shock is tuned in both length and damping specifically for this Super Duty application, and both are 100% rebuildable and 100% revalveable. These shocks are not compatible with Cab \u0026amp; Chassis models.\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\u003eApplication-Specific Damping Tune\u003c\/h2\u003e\n\u003cp\u003eThe V.S. 2.5 Aluminum Series shocks are configured for this exact Super Duty application, not adapted from a universal platform. The one-piece digressive piston carries vehicle-specific valving, which means the damping curve is calibrated for the Super Duty's weight, suspension geometry, and the 3–6 inch lift range. That specificity translates to predictable, consistent response whether the truck is loaded on the highway or working through rough terrain.\u003c\/p\u003e\n\n\u003ch2\u003eLarger Diameter for Better Heat Management\u003c\/h2\u003e\n\u003cp\u003eThe 2.5-inch aluminum body provides greater oil volume and heat dissipation capacity than the 2.0 Aluminum Series IR shocks. On extended off-road runs or repeated hard compressions, excess heat degrades damping consistency. The larger bore keeps oil temperature lower and performance more stable across those conditions. Premium grade 5WT shock oil maintains consistent damping across a wide temperature range.\u003c\/p\u003e\n\n\u003ch2\u003eRebuildable and Revalveable Construction\u003c\/h2\u003e\n\u003cp\u003eThe one-piece impact-extruded 6061 aircraft-grade aluminum cylinder, CNC-machined components, and 7\/8-inch induction-hardened chrome-plated shock shaft are all designed to be serviced rather than replaced. PTFE-lined spherical bearings and application-specific mounting hardware are included. When ride preferences or lift height change, the shocks can be revalved rather than replaced, a meaningful cost consideration over the life of a built truck.\u003c\/p\u003e\n\n\u003ch2\u003eFeatures\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVehicle-specific valving:\u003c\/strong\u003e one-piece digressive piston tuned in length and damping for this Super Duty application\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e2.5\" nitrogen-charged monotube with internal reservoir:\u003c\/strong\u003e greater oil volume and heat dissipation vs. 2.0 Series\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e6061 aircraft-grade aluminum body:\u003c\/strong\u003e impact-extruded one-piece cylinder for corrosion resistance and consistent finish\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e7\/8\" shock shaft:\u003c\/strong\u003e induction hardened and chrome plated\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePTFE-lined spherical bearings:\u003c\/strong\u003e included with application-specific mounting hardware\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e100% rebuildable and 100% revalveable:\u003c\/strong\u003e fully serviceable per Application Note #150\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\u003e37601P\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eShock body diameter\u003c\/td\u003e\n      \u003ctd\u003e2.5 in aluminum, internal reservoir\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eShock shaft diameter\u003c\/td\u003e\n      \u003ctd\u003e7\/8 in, induction hardened, chrome plated\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eBody material\u003c\/td\u003e\n      \u003ctd\u003e6061 aircraft-grade aluminum, impact extruded\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\u003eCharge gas\u003c\/td\u003e\n      \u003ctd\u003eNitrogen monotube\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\u003eShipped weight\u003c\/td\u003e\n      \u003ctd\u003e20 lb\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eVehicle fitment\u003c\/td\u003e\n      \u003ctd\u003e1999–2026 Ford Super Duty\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eLift range\u003c\/td\u003e\n      \u003ctd\u003e3–6 in rear lift over stock\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  \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 1999–2026 Ford Super Duty owners running 3–6 inches of rear lift who want a larger-diameter, rebuildable monotube shock tuned specifically for that application, whether the truck sees regular off-road use, towing on rough roads, or both.\u003c\/p\u003e\n\u003cp class=\"product-fit-no\"\u003eThese shocks do not fit Ford Super Duty Cab \u0026amp; Chassis models. They are not compatible with stock ride height or lift amounts outside the 3–6 inch rear range. Buyers seeking user-adjustable compression damping should consider ICON's CDC Valve shock option instead.\u003c\/p\u003e\n\n\u003ch2\u003eCommon Questions\u003c\/h2\u003e\n\u003ch3 class=\"product-faq-q\"\u003eWhat Ford Super Duty years and configurations do these shocks fit?\u003c\/h3\u003e\n\u003cp class=\"product-faq-a\"\u003eThe ICON V.S. 2.5 Aluminum Series Rear Shocks (37601P) fit 1999–2026 Ford Super Duty trucks with 3–6 inches of rear lift over stock. They do not fit Cab \u0026amp; Chassis models. All other Super Duty cab and bed configurations within those model years are the intended application.\u003c\/p\u003e\n\n\u003ch3 class=\"product-faq-q\"\u003eWhat lift height range do these shocks require?\u003c\/h3\u003e\n\u003cp class=\"product-faq-a\"\u003eThese rear shocks are designed and length-tuned for 3–6 inches of rear lift over stock on the 1999–2026 Ford Super Duty. Running them at stock height or outside that lift range is outside the intended application and may affect performance and fitment.\u003c\/p\u003e\n\n\u003ch3 class=\"product-faq-q\"\u003eHow do the 2.5 Series shocks differ from ICON's 2.0 Series?\u003c\/h3\u003e\n\u003cp class=\"product-faq-a\"\u003eThe 2.5-inch body provides a larger oil volume and greater heat dissipation capacity compared to the 2.0 Aluminum Series IR shocks. That larger bore helps maintain more consistent damping during extended or repeated hard use where heat buildup would otherwise affect performance.\u003c\/p\u003e\n\n\u003ch3 class=\"product-faq-q\"\u003eCan these shocks be rebuilt or revalved?\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 CNC-machined 6061 aluminum components, chrome-plated shaft, and PTFE-lined spherical bearings are designed to be serviced, so valving can be changed if lift height or use preferences change.\u003c\/p\u003e\n\n\u003ch3 class=\"product-faq-q\"\u003eWhat is included in this purchase?\u003c\/h3\u003e\n\u003cp class=\"product-faq-a\"\u003eThis listing includes a matched pair of ICON V.S. 2.5 Aluminum Series Rear Shock Absorbers with internal reservoirs (SKU 37601P), along with application-specific mounting hardware. An installation guide is available from ICON. No front shocks, springs, or other suspension components are included.\u003c\/p\u003e","brand":"ICON Vehicle Dynamics","offers":[{"title":"Default Title","offer_id":50630777765958,"sku":"37601P","price":817.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0691\/2203\/1686\/files\/c65ecbbe9c432e12b5dad5343098f575_07bca5ed-3137-4b1c-bdb2-468-sq.jpg?v=1791961602","url":"https:\/\/terrainvault.com\/products\/icon-v-s-2-5-aluminum-series-rear-shock-absorbers-for-1999-2026-ford-s","provider":"TerrainVault","version":"1.0","type":"link"}