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The ISR Performance Thermostat - Nissan VQ35HR & VQ37VHR - 68 Degree depends on engine, transmission, swap, or system details that cannot be represented safely by year-make-model alone. Match manufacturer part number IS-21200-31U03, dimensions, connections, mounting points, and required companion components before ordering.
Fitment
| Fitment Status | Fitment Verification Required |
|---|---|
| Required Verification | Exact part number, engine or system, dimensions, connections, mounting points, and required companion components |
Specifications
| Brand | ISR Performance |
|---|---|
| Manufacturer Part Number | IS-21200-31U03 |
| Product Type | Thermostats |
| Fitment Type | Fitment Verification Required |
| Condition | New |
What's Included
One new ISR Performance product identified by manufacturer part number IS-21200-31U03 in the exact configuration and quantity stated by the title. Additional gaskets, hardware, adapters, lines, fluids, mounts, sensors, tuning, and companion components are included only when expressly listed.
About ISR Performance
ISR Performance develops exhaust, engine, cooling, drivetrain, brake, steering, and suspension components for sport compact and performance vehicle applications.
Related ISR Performance Products
- Shop all ISR Performance products
- ISR Performance Thermostat - Nissan VQ35DE - 68 Degree
- ISR Performance Thermostat - Nissan SR/KA - 60 Degree
- ISR Performance - Front Tension Rod Power Brace - Nissan 240sx (S13)
Frequently Asked Questions
Why does this ISR Performance part require fitment verification?
The available application data does not support a safe year-make-model assignment. Match the exact part number, engine or system, dimensions, connections, mounting points, and required companion components before ordering.
Are additional parts or adjustments required for installation?
Requirements vary by exact part number and application. Review the current ISR instructions and confirm all gaskets, fluids, fasteners, adapters, alignment, tuning, or supporting components before installation.
Is professional installation recommended?
Yes for any job involving vehicle support, exhaust alignment, brakes, steering, suspension geometry, drivetrain components, fluids, wiring, or fabrication. Follow current ISR and factory procedures.
Installation Instructions
Follow the current ISR Performance and factory service instructions for part number IS-21200-31U03. Support the vehicle safely, inspect every mounting point, connection, gasket, line, fastener, and required companion component, verify operating clearance, torque hardware to specification, complete any required alignment or calibration, and recheck the installation after the first drive cycles.
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