{"product_id":"hks-03-06-evo-08-evo-gsr-mr-75-degree-low-temperature-oil-cooler-thermostat","title":"HKS 03-06 EVO \/ 08 EVO GSR\/MR 75 degree Low Temperature Oil Cooler Thermostat","description":"\u003cp\u003e\u003cstrong\u003eSKU:\u003c\/strong\u003e 15999-AM001 | \u003cstrong\u003eUPC:\u003c\/strong\u003e 4957266653388\u003c\/p\u003e\n\n\u003ch4\u003e\u003cstrong\u003eHKS 03-06 EVO \/ 08 EVO GSR\/MR 75 degree Low Temperature Oil Cooler Thermostat\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eThe HKS 15999-AM001 oil cooler thermostat opens at a low 75°C (167°F) to direct engine oil through the cooler for rapid temperature reduction during demanding conditions. Engineered for 2003-2006 Mitsubishi Lancer Evolution VIII\/IX and 2008+ Evolution X GSR\/MR models it maintains stable oil temperatures above freezing levels to avoid viscosity loss and ensure consistent lubrication. This direct-fit unit installs between the engine block and oil cooler line for immediate response and reliable cooling control.\u003c\/p\u003e\n\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e75°C Opening Point:\u003c\/strong\u003e Activates at lower temperature than stock for faster oil cooling without excessive drop in cold weather preserving oil film strength.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision Valve Design:\u003c\/strong\u003e Smooth wax pellet mechanism responds quickly to temperature changes directing flow only when oil exceeds set point for balanced thermal management.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact Aluminum Housing:\u003c\/strong\u003e Lightweight durable construction resists corrosion and withstands high-pressure oil flow in performance engines.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect OEM Replacement:\u003c\/strong\u003e Matches factory mounting points on Evo 4G63 and 4B11 engines for bolt-on fit without modifications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMotorsport Tested:\u003c\/strong\u003e Proven in rally and circuit applications to hold oil temps steady under sustained high loads extending engine life.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eProduct Notes\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003ePair with HKS oil cooler kit for full system efficiency.\u003c\/li\u003e\n\u003cli\u003eInspect O-rings during install and replace if worn.\u003c\/li\u003e\n\u003cli\u003eShips in protective packaging to prevent damage.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eProfessional installation recommended.\u003c\/li\u003e\n\u003cli\u003eDrain engine oil before removing stock sandwich plate.\u003c\/li\u003e\n\u003cli\u003eUses existing M14x1.5 ports no additional hardware needed.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eThis Part Fits\u003c\/h4\u003e\n\u003ctable border=\"1\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eYear\u003c\/th\u003e\n\u003cth\u003eMake\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eSubmodel\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e2003-2005\u003c\/td\u003e\n\u003ctd\u003eMitsubishi\u003c\/td\u003e\n\u003ctd\u003eLancer Evolution\u003c\/td\u003e\n\u003ctd\u003eVIII\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2005\u003c\/td\u003e\n\u003ctd\u003eMitsubishi\u003c\/td\u003e\n\u003ctd\u003eLancer Evolution\u003c\/td\u003e\n\u003ctd\u003eVIII MR\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2005-2006\u003c\/td\u003e\n\u003ctd\u003eMitsubishi\u003c\/td\u003e\n\u003ctd\u003eLancer Evolution\u003c\/td\u003e\n\u003ctd\u003eIX\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2006\u003c\/td\u003e\n\u003ctd\u003eMitsubishi\u003c\/td\u003e\n\u003ctd\u003eLancer Evolution\u003c\/td\u003e\n\u003ctd\u003eIX MR\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2008-2015\u003c\/td\u003e\n\u003ctd\u003eMitsubishi\u003c\/td\u003e\n\u003ctd\u003eLancer Evolution\u003c\/td\u003e\n\u003ctd\u003eX GSR\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2008-2015\u003c\/td\u003e\n\u003ctd\u003eMitsubishi\u003c\/td\u003e\n\u003ctd\u003eLancer Evolution\u003c\/td\u003e\n\u003ctd\u003eX MR\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch4\u003eWhy Choose HKS?\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eDecades of JDM tuning leadership with Super Taikyu endurance wins.\u003c\/li\u003e\n\u003cli\u003eComponents built to Formula drift and rally standards for real-world reliability.\u003c\/li\u003e\n\u003cli\u003eExact engineering tolerances ensure leak-free operation under boost.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e Does this fit all 2003-2006 Evo models?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e Yes it bolts directly to Evolution VIII and IX including MR variants using standard oil sandwich plate location on 4G63 engine.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e What material is the thermostat body?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e CNC-machined aluminum with stainless steel internals for heat resistance and long-term durability in high-heat oil circuits.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e Is warranty coverage included?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e HKS offers manufacturer defect warranty contact seller for claims processing after verifying proper installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eShipping \u0026amp; Handling\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMethod:\u003c\/strong\u003e UPS Ground or USPS Priority\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAvailability:\u003c\/strong\u003e In stock - ships same or next business day\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackaging:\u003c\/strong\u003e Secure box dimensions 4.72 x 3.94 x 2.36 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 4.8 ounces\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HKS","offers":[{"title":"Default Title","offer_id":43793478647887,"sku":"HKS15999-AM001","price":90.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1062\/7920\/files\/hks-03-06-evo-08-evo-gsrmr-75-degree-low-temperature-oil-cooler-thermostat-hks.jpg?v=1767417742","url":"https:\/\/www.blackopsautoworks.com\/products\/hks-03-06-evo-08-evo-gsr-mr-75-degree-low-temperature-oil-cooler-thermostat","provider":"Black Ops Auto Works","version":"1.0","type":"link"}