Exterior Components› Body Panels and Components

ISR Performance

ISR Performance Thermostat - Nissan VQ35HR & VQ37VHR - 68 Degree

$70.13

SKU: I00Z IS-21200-31U03

In Stock
In Stock
Ships by Jun 17
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Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

The ISR Performance thermostat is a colder thermostat designed for VQ35HR and VQ37VHR engines. It opens at 68°C, which is 10°C lower than the factory standard of 78°C. This allows coolant to flow through the engine sooner, reducing and maintaining cooler engine temperatures.

Fitment

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Specifications

BrandISR Performance
Part NumberI00Z IS-21200-31U03

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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