{"product_id":"fox-2-5-performance-series-ifp-hto-shock-absorber-987-24-010-2020-2026-6-6l-duramax-front-lifted-1-5-2-5","title":"FOX 2.5 PERFORMANCE SERIES IFP HTO SHOCK ABSORBER 987-24-010 | 2020-2026 6.6L DURAMAX (FRONT - LIFTED 1.5\"-2.5\")","description":"\u003cp\u003eImprove on-road handling and off-road suspension performance in your Chevy Silverado or GMC Sierra 2500HD\/3500HD with the FOX 2.5 Performance Series IFP HTO Shock Absorber. Designed as a bolt-on upgrade, this shock combines application-specific valving, a large 2.5-inch shock body, and position-sensitive damping technology for improved suspension control across a variety of driving conditions.\u003c\/p\u003e\n\n\u003cp\u003eThe \u003cstrong\u003e2.5-inch impact-extruded 6061-T6 aluminum shock body\u003c\/strong\u003e provides increased oil capacity while efficiently dissipating heat during demanding use. A Type II clear-anodized finish helps protect the aluminum body against corrosion for long-term durability.\u003c\/p\u003e\n\n\u003cp\u003eAn \u003cstrong\u003eInternal Floating Piston (IFP)\u003c\/strong\u003e separates the shock oil from the high-pressure nitrogen charge, helping prevent oil aeration and maintain consistent damping performance. FOX combines the IFP design with application-specific precision valving and high-flow, velocity-sensitive damping for controlled suspension response both on and off the pavement.\u003c\/p\u003e\n\n\u003cp\u003eFOX \u003cstrong\u003eHydraulic Top Out (HTO)\u003c\/strong\u003e technology provides position-sensitive rebound control as the suspension approaches full extension. The system routes shock oil through a secondary shim stack to progressively slow shock shaft speed, helping reduce harsh top-out events and improve suspension control. HTO can be particularly beneficial on trucks equipped with heavier tires or suspension systems providing additional lift over stock.\u003c\/p\u003e\n\n\u003cp\u003eThe Performance Series shock is fully rebuildable and re-tunable, allowing it to be serviced or adjusted as vehicle and suspension requirements change.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e2.5-inch shock body\u003c\/strong\u003e – Increased oil capacity supports consistent damping and improved heat management\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHydraulic Top Out (HTO)\u003c\/strong\u003e – Provides position-sensitive rebound damping to help reduce harsh suspension top-outs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInternal Floating Piston (IFP)\u003c\/strong\u003e – Separates shock oil from the high-pressure nitrogen charge to help prevent aeration\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplication-specific tuning\u003c\/strong\u003e – Factory valving is engineered for the intended vehicle application\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh-flow velocity-sensitive damping\u003c\/strong\u003e – Provides controlled response across changing suspension speeds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e6061-T6 aluminum construction\u003c\/strong\u003e – Impact-extruded body provides strength and efficient heat dissipation\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eType II clear-anodized finish\u003c\/strong\u003e – Helps protect the aluminum shock body against corrosion\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e5\/8-inch hard chrome shaft\u003c\/strong\u003e – Designed for strength and durability in demanding applications\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFully rebuildable and re-tunable\u003c\/strong\u003e – Can be serviced and adjusted for changing suspension requirements\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBolt-on installation\u003c\/strong\u003e – Designed as an application-specific suspension upgrade\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSold individually\u003c\/strong\u003e – One shock absorber per package\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries:\u003c\/strong\u003e FOX 2.5 Performance Series\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eExtended Length:\u003c\/strong\u003e 18.95\"\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompressed Length:\u003c\/strong\u003e 13.76\"\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTravel:\u003c\/strong\u003e 5.18\"\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTop Mount:\u003c\/strong\u003e Bar Pin\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBottom Mount:\u003c\/strong\u003e Clevis\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShaft Diameter:\u003c\/strong\u003e 5\/8\"\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShock Body Diameter:\u003c\/strong\u003e 2.5\"\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBody Material:\u003c\/strong\u003e 6061-T6 Aluminum\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eApplication Notes\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eManufacturer lift-height recommendations are intended as a general application guide.\u003c\/li\u003e\n  \u003cli\u003eDue to variations between aftermarket suspension systems, measuring the vehicle's required extended and compressed shock lengths is recommended to verify proper fitment.\u003c\/li\u003e\n  \u003cli\u003eShock absorbers are sold individually.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eApplication:\u003c\/strong\u003e Chevy Silverado \/ GMC Sierra 2500HD \u0026amp; 3500HD\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePart Number:\u003c\/strong\u003e 987-24-010\u003c\/p\u003e","brand":"Fox","offers":[{"title":"Default Title","offer_id":54061687406875,"sku":"987-24-010","price":346.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0962\/5757\/3147\/files\/Screenshot2026-09-28at3.45.27PM.png?v=1790631951","url":"https:\/\/wwmperformance.com\/products\/fox-2-5-performance-series-ifp-hto-shock-absorber-987-24-010-2020-2026-6-6l-duramax-front-lifted-1-5-2-5","provider":"WWM Performance","version":"1.0","type":"link"}