{"product_id":"bilstein-5160-series-99-04-ford-f250-350-super-duty-front-shock-absorbers-for-4-6in-lift","title":"Bilstein 25-311877 B8 5160 Front Shock 4-6in Lift for 99-04 Ford F-250\/F-350 4WD","description":"\u003ch4\u003eVehicle Fitment\u003c\/h4\u003e\u003cul\u003e \u003cli\u003e1999-2004 Ford F-250 Super Duty (XL, XLT, Lariat - 4WD\/4x4, 5.4L V8 Triton)\u003c\/li\u003e \u003cli\u003e1999-2004 Ford F-250 Super Duty (XL, XLT, Lariat - 4WD\/4x4, 6.8L V10 Triton)\u003c\/li\u003e \u003cli\u003e1999-2003 Ford F-250 Super Duty (XL, XLT, Lariat - 4WD\/4x4, 7.3L Power Stroke Diesel V8)\u003c\/li\u003e \u003cli\u003e2003-2004 Ford F-250 Super Duty (XL, XLT, Lariat - 4WD\/4x4, 6.0L Power Stroke Diesel V8)\u003c\/li\u003e \u003cli\u003e2003-2004 Ford F-250 Super Duty (King Ranch - 4WD\/4x4, 6.8L V10 Triton \/ 6.0L Power Stroke Diesel V8)\u003c\/li\u003e \u003cli\u003e2004 Ford F-250 Super Duty (Harley-Davidson Edition - 4WD\/4x4, 6.8L V10 Triton \/ 6.0L Power Stroke Diesel V8)\u003c\/li\u003e \u003cli\u003e1999-2004 Ford F-350 Super Duty (XL, XLT, Lariat - 4WD\/4x4, 5.4L V8 Triton)\u003c\/li\u003e \u003cli\u003e1999-2004 Ford F-350 Super Duty (XL, XLT, Lariat - 4WD\/4x4, 6.8L V10 Triton)\u003c\/li\u003e \u003cli\u003e1999-2003 Ford F-350 Super Duty (XL, XLT, Lariat - 4WD\/4x4, 7.3L Power Stroke Diesel V8)\u003c\/li\u003e \u003cli\u003e2003-2004 Ford F-350 Super Duty (XL, XLT, Lariat - 4WD\/4x4, 6.0L Power Stroke Diesel V8)\u003c\/li\u003e \u003cli\u003e2003-2004 Ford F-350 Super Duty (King Ranch - 4WD\/4x4, 6.8L V10 Triton \/ 6.0L Power Stroke Diesel V8)\u003c\/li\u003e \u003cli\u003e2004 Ford F-350 Super Duty (Harley-Davidson Edition - 4WD\/4x4, 6.8L V10 Triton \/ 6.0L Power Stroke Diesel V8)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFitment Notes\u003c\/h4\u003e\u003cul\u003e \u003cli\u003eFits 4WD (4x4) drivetrain only - does NOT fit 2WD (RWD) models.\u003c\/li\u003e \u003cli\u003eDesigned for vehicles with 4-6 inches of front lift - not suitable for stock-height or 0-2.5 inch lift applications.\u003c\/li\u003e \u003cli\u003eFront position only - sold as a single unit (one shock per purchase); two required for a complete front installation.\u003c\/li\u003e \u003cli\u003eThe 7.3L Power Stroke diesel was phased out mid-2003 model year and replaced by the 6.0L Power Stroke; both engines are supported within their respective production years.\u003c\/li\u003e \u003cli\u003eFront compression bump stop on the chassis may require modification to prevent contact with the shock body - verify clearance during installation.\u003c\/li\u003e \u003cli\u003eFX4 Off-Road Package equipped trucks are supported; verify lift height compatibility with FX4-specific suspension geometry before installation.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFeatures\u003c\/h4\u003e\u003cul\u003e \u003cli\u003eRemote reservoir design significantly increases oil volume and cooling capacity for consistent, fade-free damping during sustained off-road driving and high-load towing conditions.\u003c\/li\u003e \u003cli\u003e46mm monotube construction provides superior heat dissipation and damping consistency compared to conventional twin-tube shock absorbers.\u003c\/li\u003e \u003cli\u003eVelocity-sensitive digressive valve settings are tuned specifically for the 1999-2004 Ford F-250\/F-350 Super Duty 4WD platform with 4-6 inch lift configurations.\u003c\/li\u003e \u003cli\u003e360-degree swivel banjo hose fitting allows clean, low-profile reservoir routing without hose binding or clearance conflicts.\u003c\/li\u003e \u003cli\u003eIncreases available wheel travel beyond what standard or non-reservoir shocks can deliver, improving terrain compliance and traction on lifted trucks.\u003c\/li\u003e \u003cli\u003eApplication-specific damping tune balances on-road composure with aggressive off-road capability for heavy-duty use.\u003c\/li\u003e \u003cli\u003eBillet reservoir mount bracket included for secure, rattle-free installation.\u003c\/li\u003e \u003cli\u003eHigh-pressure nitrogen gas charge prevents oil aeration (cavitation) and maintains consistent damping force under extreme loads and temperatures.\u003c\/li\u003e \u003cli\u003eDirect-fit design uses OE-style upper Eye 16mm and lower Eye 12mm mounting hardware for straightforward bolt-on installation.\u003c\/li\u003e \u003cli\u003eBuilt to handle the added stress of 4-6 inch suspension lifts, correcting shock geometry and travel on heavily modified Super Duty platforms.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eSpecifications\u003c\/h4\u003e\u003cul\u003e \u003cli\u003ePart Number: 25-311877\u003c\/li\u003e \u003cli\u003eSeries: B8 5160 Remote Reservoir\u003c\/li\u003e \u003cli\u003ePosition: Front (sold individually - one shock per unit)\u003c\/li\u003e \u003cli\u003ePiston Diameter: 46mm digressive monotube\u003c\/li\u003e \u003cli\u003eLift Range Compatibility: 4-6 inches\u003c\/li\u003e \u003cli\u003eCollapsed Length: 15.96 inches\u003c\/li\u003e \u003cli\u003eExtended Length: 27.02 inches\u003c\/li\u003e \u003cli\u003eUpper Mount Type: Eye 16mm\u003c\/li\u003e \u003cli\u003eLower Mount Type: Eye 12mm\u003c\/li\u003e \u003cli\u003eReservoir Type: Remote (360° swivel banjo hose fitting)\u003c\/li\u003e \u003cli\u003eGas Charge: High-pressure nitrogen monotube\u003c\/li\u003e \u003cli\u003eWarranty: 90-day limited against manufacturer defects (B8 5160 series)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eIncluded Components\u003c\/h4\u003e\u003cul\u003e \u003cli\u003e1x Bilstein B8 5160 Front Remote Reservoir Shock (25-311877)\u003c\/li\u003e \u003cli\u003e1x Billet reservoir mount bracket\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eProduct Description\u003c\/h4\u003e\u003cp\u003eThe Bilstein 25-311877 B8 5160 front remote reservoir shock is engineered as a direct-fit performance solution for 1999-2004 Ford F-250 and F-350 Super Duty trucks running 4-6 inches of front suspension lift on a 4WD platform. Designed for the demands of serious off-road use and heavy-duty truck builds, the B8 5160 brings race-proven remote reservoir technology to a bolt-on package. The external reservoir dramatically increases the shock's oil volume, delivering the kind of sustained heat management that conventional shocks simply cannot provide under repeated hard use - whether that means desert trail running, rock crawling, or heavy payload hauling on rough roads.\u003c\/p\u003e\u003cp\u003eAt the core of the 25-311877 is Bilstein's 46mm monotube design, which keeps oil and gas permanently separated to prevent aeration (cavitation) and maintain consistent damping force across the full range of suspension travel. Velocity-sensitive digressive valve settings are tuned specifically for the lifted Super Duty platform, responding to slow and fast suspension inputs with the appropriate amount of damping force - firm and controlled at high speed, compliant and absorbent over sharp impacts. The 360-degree swivel banjo hose fitting on the reservoir line allows the hose to route cleanly without binding or chafing, and the included billet reservoir mount bracket ensures a rattle-free installation finish.\u003c\/p\u003e\u003cp\u003eThis shock fits all major trim levels of the first-generation Ford Super Duty - including XL, XLT, Lariat, King Ranch, and Harley-Davidson Edition - across all available 4WD powertrains: the 5.4L V8 Triton, 6.8L V10 Triton, 7.3L Power Stroke diesel (1999-2003), and 6.0L Power Stroke diesel (2003-2004). It is strictly a 4WD application and is sized specifically for 4-6 inch lifted front suspensions; it is not intended for stock-height or low-lift configurations. Two units are required for a complete front installation. Note that the front chassis bump stop may require modification to ensure proper shock clearance - verify during installation. For heavy-duty truck owners who have committed to a serious lift and demand more from their suspension than entry-level shocks can offer, the Bilstein B8 5160 is the definitive upgrade.\u003c\/p\u003e","brand":"Bilstein","offers":[{"title":"Default Title","offer_id":53190718685503,"sku":"BIL25-311877","price":299.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0832\/7308\/9343\/files\/328e8f6023eb2496b45481efd3e9bfe8L.jpg?v=1779929221","url":"https:\/\/wcaperformance.com\/products\/bilstein-5160-series-99-04-ford-f250-350-super-duty-front-shock-absorbers-for-4-6in-lift","provider":"WCA Performance","version":"1.0","type":"link"}