ISR Performance 68 Degree Thermostat | Multiple Infiniti Fitments (IS-21200-31U03/13)ISR Performance Thermostat Fitment: Specific to Infiniti G35 (20032008) and G37 (20092013) with VQ35HR & VQ37VHR engines Part #: IS 21200 31U13 Overview The ISR Performance 68 Degree Thermostat is a high quality upgrade designed for Infiniti G35 and G37 owners who want to optimize their engine's cooling system. Crafted specifically for the VQ35HR and VQ37VHR engines, this thermostat helps maintain consistent operating temperatures, supporting reliable
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