{"product_id":"isr-performance-thermostat-nissan-vq35de-68-degree","title":"ISR Performance Thermostat - Nissan VQ35DE - 68 Degree","description":"\u003cp\u003eThe ISR Performance 68°C Thermostat for the Nissan VQ35DE drops the coolant temperature opening point from the factory 78°C to a colder 68°C. Better margin against heat soak on high-performance VQ35DE builds, which is the kind of cheap insurance you want on a hard-driven 350Z or G35. \u003cstrong\u003eThis is the VQ35DE variant with the water port\u003c\/strong\u003e. the VQ35HR and VQ37VHR versions need a different thermostat (IS-21200-31U03, no water port).\u003c\/p\u003e\n\n\u003ch3\u003eWhat It Does\u003c\/h3\u003e\n\u003cp\u003eThe factory thermostat opens at 78°C, which is fine for emissions-cycle warm-up but leaves you closer to overheating territory once the engine is making real power. Opening at 68°C means coolant starts flowing through the engine sooner once it warms up, holding lower steady-state temperatures and giving you more margin before the gauge starts climbing. Useful on track days, summer driving, and forced-induction VQ35DE builds.\u003c\/p\u003e\n\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eNissan VQ35DE engines with water port only.\u003c\/strong\u003e Will NOT fit VQ35HR or VQ37VHR engines. those use the IS-21200-31U03 variant without the water port. Confirm your engine code before ordering.\u003c\/p\u003e\n\n\u003ch3\u003eProduct Details\u003c\/h3\u003e\n\u003cp style=\"margin-bottom: 4px;\"\u003e\u003cstrong\u003eBrand:\u003c\/strong\u003e ISR Performance\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 4px;\"\u003e\u003cstrong\u003ePart Number:\u003c\/strong\u003e IS-21200-31U13\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 4px;\"\u003e\u003cstrong\u003eType:\u003c\/strong\u003e Cooler-temp thermostat\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 4px;\"\u003e\u003cstrong\u003eEngine:\u003c\/strong\u003e Nissan VQ35DE (with water port)\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 4px;\"\u003e\u003cstrong\u003eOpening Temperature:\u003c\/strong\u003e 68°C (vs factory 78°C)\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 4px;\"\u003e\u003cstrong\u003eExcluded:\u003c\/strong\u003e VQ35HR, VQ37VHR (use IS-21200-31U03)\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 4px;\"\u003e\u003cstrong\u003eApplication:\u003c\/strong\u003e High-performance VQ35DE builds, track use\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 4px;\"\u003e\u003cstrong\u003eSold:\u003c\/strong\u003e Individually\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 4px;\"\u003e\u003cstrong\u003eLegality:\u003c\/strong\u003e Off-road and competition use only\u003c\/p\u003e","brand":"ISR Performance","offers":[{"title":"Default Title","offer_id":45957112987845,"sku":"IS-21200-31U13","price":60.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/2718\/9701\/files\/P1170350__11120.1611606155.1280.1280__07981.1630073088.500.659.jpg?v=1773346905","url":"https:\/\/www.isrcompetition.com\/products\/isr-performance-thermostat-nissan-vq35de-68-degree","provider":"ISR Competition","version":"1.0","type":"link"}