{"product_id":"performance-water-pump-kit-for-subaru-impreza-1993-2005-1-8l-2-2l-2-5l","title":"Performance Water Pump Kit for Subaru Impreza (1993-2005) 1.8L 2.2L 2.5L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eHigh-Flow Water Pump \u0026amp; Thermostat Refresh Kit for 1993-2005 Subaru Impreza (GC \/ GD)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The Performance Water Pump Kit refreshes the primary cooling loop on the 1993-2005 Subaru Impreza to eliminate cavitation, ensure stable coolant circulation, and prevent catastrophic thermal cycling across horizontally opposed cylinder banks.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Subaru Impreza Boxer Cooling Weakness\u003c\/h3\u003e\n\u003cp\u003eNaturally aspirated Subaru \u003cstrong\u003eEJ series\u003c\/strong\u003e engines (including the \u003cstrong\u003eEJ18\u003c\/strong\u003e, \u003cstrong\u003eEJ22\u003c\/strong\u003e, and \u003cstrong\u003eEJ25\u003c\/strong\u003e) operate under tight thermal margins due to their open and semi-closed deck flat-four architecture. Factory mechanical water pumps are prone to weep-hole leaks, internal bearing breakdown, and stamped-impeller erosion over high mileage. Combined with aged wax-pellet thermostats that seize partially open or closed, the stock system suffers localized hot spots. In the \u003cstrong\u003eGC\u003c\/strong\u003e and \u003cstrong\u003eGD\u003c\/strong\u003e chassis, this uneven thermal expansion directly precipitates premature cylinder head gasket failure—the most infamous vulnerability of naturally aspirated boxer engines.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis comprehensive service assembly delivers structural durability and steady coolant flow under elevated thermal loads. Built with a precision die-cast OE-matched aluminum housing and a balanced, high-efficiency impeller, this unit mitigates fluid cavitation at higher engine RPMs while maintaining optimal boundary-layer heat transfer across the cylinder jackets. The kit includes a high-grade mechanical wax-pellet engine thermostat calibrated for factory-correct opening temperature, paired with premium replacement gaskets to ensure zero-leak sealing against the timing belt backing plate. This direct mechanical refresh restores critical coolant loop integrity on naturally aspirated EJ platforms.\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;\"\u003e1993-2005 Subaru Impreza\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;\"\u003eEJ18, EJ22, EJ25D, EJ251, EJ253 \/ GC, GF, GM, GD, GG\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;\"\u003e110-165 hp \/ 110-166 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\u003e1993-1997 Subaru Impreza 1.8L Gas SOHC Naturally Aspirated\u003c\/li\u003e\n  \u003cli\u003e1995-2001 Subaru Impreza 2.2L Gas SOHC Naturally Aspirated\u003c\/li\u003e\n  \u003cli\u003e1998 Subaru Impreza 2.5L Gas DOHC Naturally Aspirated\u003c\/li\u003e\n  \u003cli\u003e1999-2005 Subaru Impreza 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 GC \/ GD Impreza?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 1993-2005 Subaru Impreza equipped with the naturally aspirated \u003cstrong\u003eEJ18\u003c\/strong\u003e, \u003cstrong\u003eEJ22\u003c\/strong\u003e, or \u003cstrong\u003eEJ25\u003c\/strong\u003e engines. \u003cstrong\u003eThis kit is strictly for naturally aspirated applications 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 pump?\u003c\/h4\u003e\n\u003cp\u003eYes, Subaru boxer engines are notoriously prone to trapped air pockets in the heater core and cylinder heads; use a spill-free funnel to thoroughly burp the system until the thermostat cycles.\u003c\/p\u003e\n\n\u003ch3\u003eThe Subaru Performance Standard\u003c\/h3\u003e\n\u003cp\u003eSubaru EJ flat-four engines demand precise thermal management to run reliably at high RPMs and heavy loads. Installing direct-fit, OE-geometry cooling components guarantees factory-correct timing belt alignment, smooth bearing rotation, and optimal engine protection for your JDM street or track machine.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67923239239928,"sku":"DS-E7DYMWB0P","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-impreza-1993-2005-1-8l-2-2l-2-5l-1.jpg?v=1793555498","url":"https:\/\/performancechiptuning.com\/es\/products\/performance-water-pump-kit-for-subaru-impreza-1993-2005-1-8l-2-2l-2-5l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}