{"product_id":"isr-performance-colder-thermostat-sr-ka","title":"ISR Performance Colder Thermostat: SR \u0026 KA","description":"\u003cp\u003eThe ISR Performance Colder Thermostat is a lower-temperature replacement thermostat for the Nissan SR20DET and KA24DE engines. Opens at 60 degrees Celsius (140 degrees Fahrenheit) compared to the factory thermostat's 76.5 degrees Celsius (170 degrees Fahrenheit) opening temperature. A simple, low-cost cooling upgrade that gets the radiator into the loop earlier on high-output or hard-driven engines.\u003c\/p\u003e\n\n\u003ch3\u003eWhat It Does\u003c\/h3\u003e\n\u003cp\u003eOnce an engine is fully warmed up, the thermostat is the gate that controls when coolant starts flowing through the radiator. A factory thermostat is set conservatively for emissions, fuel economy, and cabin heat performance, which means coolant temperatures climb higher than necessary before the radiator starts pulling heat out. The ISR thermostat opens 16.5 degrees Celsius earlier, which gets coolant flowing through the radiator sooner and helps the engine maintain lower steady-state operating temperatures.\u003c\/p\u003e\n\n\u003cp\u003eThis is a meaningful upgrade on hard-driven SR20DET and KA24DE builds (turbo, drift, track) where the factory thermostat keeps the engine warmer than ideal under sustained load. It's a fully-warmed-up modification, not a way to skip warm-up.\u003c\/p\u003e\n\n\u003ch3\u003eCritical Note\u003c\/h3\u003e\n\u003cp\u003eA colder thermostat will not affect cold-start behavior or reduce the warm-up period. It only changes the temperature at which the thermostat opens fully once the engine has reached operating temperature.\u003c\/p\u003e\n\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eNissan SR20DET (all variants - S13 Redtop, S14, S15)\u003c\/li\u003e\n\u003cli\u003eNissan KA24DE (S13 and S14 240SX)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat's in the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1x ISR Performance colder thermostat (60 degrees Celsius opening)\u003c\/li\u003e\n\u003c\/ul\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-21200-60\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 4px;\"\u003e\u003cstrong\u003eType:\u003c\/strong\u003e Performance Thermostat (Lower Opening Temp)\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 4px;\"\u003e\u003cstrong\u003eEngine Fitment:\u003c\/strong\u003e Nissan SR20DET, KA24DE\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 4px;\"\u003e\u003cstrong\u003eISR Opening Temperature:\u003c\/strong\u003e 60 degrees Celsius (140 degrees Fahrenheit)\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 4px;\"\u003e\u003cstrong\u003eFactory Opening Temperature:\u003c\/strong\u003e 76.5 degrees Celsius (170 degrees Fahrenheit)\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 4px;\"\u003e\u003cstrong\u003eTemperature Difference:\u003c\/strong\u003e 16.5 degrees Celsius earlier opening\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 4px;\"\u003e\u003cstrong\u003eApplication:\u003c\/strong\u003e Turbo, drift, track, and other hard-driven SR \/ KA builds\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":45957128323269,"sku":"IS-21200-60","price":49.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/2718\/9701\/files\/212002__16069.1630073049.500.659.jpg?v=1773346605","url":"https:\/\/www.isrcompetition.com\/products\/isr-performance-colder-thermostat-sr-ka","provider":"ISR Competition","version":"1.0","type":"link"}