SKU: 43080T | UPC: 802735040111
Granatelli Motor Sports High Flow Thermostat – Dodge 5.7L / 6.1L / 6.4L HEMI
The Granatelli Motor Sports 43080T High Flow Thermostat is a performance cooling upgrade for Dodge, Chrysler, Jeep, and Ram vehicles equipped with 5.7L, 6.1L, and 6.4L HEMI engines. This precision-engineered thermostat opens at a lower temperature than stock, allowing increased coolant flow for reduced heat soak, faster warm-up, better throttle response, and improved overall engine efficiency. Ideal for performance builds, towing, track use, or hot climates, it provides superior cooling without sacrificing normal operating temperatures.
Key Features
- Lower Opening Temperature – Opens earlier than OEM for quicker coolant circulation and reduced peak temperatures
- High-Flow Design – Larger ports and improved valve allow up to 50% more coolant flow for superior heat dissipation
- Precision Calibration – Manufactured to exact tolerances for consistent performance and reliable operation
- Direct Replacement – Fits factory housing with no modifications required
- Durable Construction – High-quality brass and stainless components resist corrosion and wea
| Spec | Detail |
|---|---|
| Part Number | 43080T |
| Brand | Granatelli Motor Sports |
| Type | High Flow Thermostat |
| Compatibility | Dodge, Chrysler, Jeep, and Ram with 5.7L, 6.1L, and 6.4L HEMI engines |
| Material | Brass / Stainless Steel |
| Opening Temperature | Lower than OEM (typically 160-170°F – verify application) |
| Flow Improvement | Up to 50% increased coolant flow |
| Country of Origin | United States |
| Warranty | Limited Lifetime Warranty |
Whats Included
- 1 x Granatelli High Flow Thermostat
Product Notes
- Application-specific – confirm exact opening temperature for your HEMI model
- Ideal for performance builds, towing, or hot climates – reduces heat soak and improves cooling efficiency
- Compatible with stock or aftermarket cooling systems
Installation Notes
- Estimated time: 30–60 minutes, moderate difficulty
- Drain coolant, replace stock thermostat, refill and bleed system thoroughly
- Professional installation recommended
This Part Fits
| Year Range | Make | Model | Trim / Engine | Notes |
|---|---|---|---|---|
| 2011-2024 | Chrysler | 300 | 5.7L Hemi / 6.4L 392 | High Flow Thermostat |
| 2012-2024 | Chrysler | 300 | 6.4L 392 | High Flow Thermostat |
| 2005-2010 | Chrysler | 300C | 5.7L Hemi / 6.1L SRT8 | High Flow Thermostat |
| 2009-2023 | Dodge | Challenger | 5.7L Hemi / 6.1L SRT8 / 6.2L Hellcat / 6.4L 392 | High Flow Thermostat |
| 2005-2023 | Dodge | Charger | 5.7L Hemi / 6.1L SRT8 / 6.2L Hellcat / 6.4L 392 | High Flow Thermostat |
| 2004-2025 | Dodge | Durango | 5.7L Hemi / 6.2L Hellcat / 6.4L 392 | High Flow Thermostat |
| 2005-2008 | Dodge | Magnum | 5.7L Hemi / 6.1L SRT8 | High Flow Thermostat |
| 2002-2010 | Dodge | Ram | 5.7L Hemi | High Flow Thermostat |
| 2005-2025 | Jeep | Grand Cherokee | 5.7L Hemi / 6.1L SRT8 / 6.2L Trackhawk / 6.4L SRT | High Flow Thermostat |
| 2021-2025 | Jeep | Wrangler | 6.4L 392 | High Flow Thermostat |
Why Choose Granatelli High Flow Thermostats?
- Precision engineering delivers lower operating temps and improved cooling efficiency
- High-flow design supports performance mods, towing, or hot climates
- Limited lifetime warranty ensures long-term reliability
Frequently Asked Questions
- Q: What temperature does it open?
A: Lower than stock (typically 160-170°F) – exact temp varies by application for optimal cooling. - Q: Will it cause over-cooling?
A: No, calibrated for proper warm-up while improving high-load cooling. - Q: Is it compatible with supercharged Hemi?
A: Yes, excellent for Hellcat/Redeye; reduces heat soak under boost. - Q: Does it require special tools?
A: Basic hand tools drain coolant, replace thermostat, refill and bleed system.
Shipping & Handling
- Method: UPS/FedEx Ground
- Availability: In stock – ships same or next business day
- Packaging: Official Granatelli retail box
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