ISR Performance Thermostat

Fitment: Specific to Infiniti G35 (2003–2008) and G37 (2009–2013) 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 performance during spirited driving or high-stress conditions. By replacing the factory unit with this precision-engineered component, drivers can benefit from improved temperature regulation, which can contribute to enhanced engine longevity and efficiency. This thermostat is ideal for enthusiasts seeking to fine-tune their vehicle's cooling system for better response and durability.

Key Features

This thermostat features a durable construction with high-grade materials designed to withstand the thermal stresses of high-performance driving. Its 68-degree opening temperature ensures precise control over coolant flow, helping to keep your engine within optimal temperature ranges. The compact, engineered design promotes quick response times and reliable operation, reducing the risk of overheating or temperature fluctuations. Easy to install with a direct fit, it is an essential upgrade for those looking to improve engine cooling performance and support the longevity of their VQ-powered Infiniti.

Construction & Design

Built with high-quality materials, this thermostat features a corrosion-resistant housing and a precisely calibrated valve to ensure consistent opening at the specified temperature. Its robust design is intended to provide long-lasting performance and reliable operation under demanding conditions.

Installation & Fitment

Designed for a straightforward bolt-on replacement, this thermostat fits directly into the factory housing on compatible Infiniti G35 and G37 models. Proper installation should be performed following standard procedures, ensuring a secure seal and optimal function.

What’s Included

The package includes the ISR Performance 68 Degree Thermostat, ready for installation in your vehicle’s cooling system. No additional hardware is typically required, but verify fitment with your specific model before installation.

Ideal For

This product is ideal for Infiniti G35 and G37 owners who want to improve engine temperature management, support high-performance driving, or replace a worn or faulty thermostat to maintain optimal cooling efficiency.