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ISR Performance Colder Thermostat: SR & KA

$35.00 $34.99 (You save $0.01)
5 Star Rating

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ISR Performance Colder Thermostat: SR & KA

ISR Performance colder temp thermostat for KA24DE and SR20DET. Good upgrade for High performance engines, where the ISR units opens at 60 deg celsius compared to factory 76.5 deg celsius. Cool down your motor before heat build up!

Once the engine is fully warmed up the ISR thermostat will open up at a lower temperature than standard thermostats, also allowing the coolant to flow through the engine sooner thus reducing and maintaining cooler engine temperatures.


  1. Works as advertised

    Posted by Remus on

    Had a leaking water pump on my SR, so I replaced it and also bought this thermostat for good measure. Engine temps now stay much cooler and it drops even lower during highway driving. Great product.

  2. Works great

    Posted by Ben on

    A lot cheaper then a Nismo and functions all the same. Updated my cooking system with this and a clutch fan shroud. Engine never sees above 180 degrees.

  3. It works

    Posted by Peter Kaoliu Saelee on

    I installed this thermostat into my SR with a Power FC. The Power FC's handheld controller indicates that my water temps stabilizes around 60-67 degree Celsius. Therefore validating that the thermostat does what it is supposed to - open up sooner than OEM.

  4. Very noticeable difference

    Posted by ray L on

    After I installed this i ran my SR till normal engine temps and instantly noticed how much cooler it was running. Stock rad with stock SR blacktop and my temps were almost halved at idle. Worth it

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