{"product_id":"performance-water-pump-kit-for-subaru-outback-2000-2005-2-5l","title":"Performance Water Pump Kit for Subaru Outback (2000-2005) 2.5L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eHigh-Efficiency Water Pump \u0026amp; Thermostat Kit for 2000-2005 Subaru Outback (BH\/BP)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The Performance Water Pump Kit replaces worn cooling components on the 2000-2005 Subaru Outback to restore factory coolant circulation rates and prevent localized hot spots across the boxer cylinder heads.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Subaru Outback Cooling Weakness\u003c\/h3\u003e\n\u003cp\u003eThe horizontally opposed layout of the \u003cstrong\u003eEJ251\u003c\/strong\u003e and \u003cstrong\u003eEJ253\u003c\/strong\u003e engines places critical thermal stress on cooling passages. Factory water pump bearings develop radial play over high mileage, leading to mechanical seal failure, coolant weeping, and impeller cavitation. When combined with an aged factory thermostat stuck partially open or closed, fluid velocity drops significantly. This lack of uniform heat dissipation directly accelerates head gasket failure, a well-known vulnerability on naturally aspirated \u003cstrong\u003eBH\/BP\u003c\/strong\u003e chassis Subaru models.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis kit provides a comprehensive cooling refresh engineered to OE dimensional specifications. The belt-driven mechanical water pump utilizes a high-flow cast housing and precision-balanced impeller to maintain balanced hydrostatic pressure through both cylinder banks. Paired with a heavy-duty, wax-pellet thermostat (replacing OEM \u003cstrong\u003e21200AA072\u003c\/strong\u003e) calibrated to exact OEM opening thresholds, it regulates operating temperatures under load. Included premium-grade gaskets eliminate mating surface micro-leaks without requiring RTV silicone.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 Mechanical Water Pump Assembly\u003c\/li\u003e\n  \u003cli\u003e1 Water Pump Gasket\u003c\/li\u003e\n  \u003cli\u003e1 Engine Coolant Thermostat\u003c\/li\u003e\n  \u003cli\u003e1 Thermostat Seal\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; margin-bottom: 20px;\"\u003e\n  \u003ctable width=\"100%\" style=\"border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 14px; min-width: 300px;\"\u003e\n    \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eFitment\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e2000-2005 Subaru Outback\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eEngine \/ Chassis\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003eEJ251, EJ253 \/ BH, BP\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eStock Output\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e165 hp \/ 166 lb-ft\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eReplaces OEM Part #\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e21111AA000, 21111AA001, 21111AA002, 21111AA003, 21111AA004, 21111AA005, 21111AA006, 21111AA007, 21111AA011, 21111AA110, 21200AA071, 21200AA072, AW9223, WP777, US9223, CP9223, NP1487, PA786, VKPC99407\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2000-2005 Subaru Outback 2.5L Gas SOHC Naturally Aspirated\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions \u0026amp; Fitment Warnings\u003c\/h3\u003e\n\u003ch4\u003eDoes this fit the BH\/BP Outback?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 2000-2005 Subaru Outback equipped with the \u003cstrong\u003eEJ251\u003c\/strong\u003e or \u003cstrong\u003eEJ253\u003c\/strong\u003e engine. \u003cstrong\u003eThis kit is engineered strictly for naturally aspirated SOHC models and does not fit turbocharged WRX, STI, or Legacy GT models.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch4\u003eDo I need to bleed the cooling system after installing this kit?\u003c\/h4\u003e\n\u003cp\u003eYes, boxer engines require thorough vacuum filling or burping with a spill-free funnel to ensure zero air pockets remain around the thermostat housing.\u003c\/p\u003e\n\n\u003ch3\u003eThe Subaru Boxer Standard\u003c\/h3\u003e\n\u003cp\u003eEngineered to handle extreme seasonal shifts and sustained all-wheel-drive loads, this kit restores reliable fluid dynamics and thermal balance to keep your EJ-series flat-four running cool.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67923273777400,"sku":"DS-EOKBGS0SI","price":79.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/performance-water-pump-kit-for-subaru-outback-2000-2005-2-5l-1.jpg?v=1793557358","url":"https:\/\/performancechiptuning.com\/de\/products\/performance-water-pump-kit-for-subaru-outback-2000-2005-2-5l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}