SKU: TS-SU-755HF
Torque Solution Subaru EJ Engines High Flow Billet Thermostat Housing
The Torque Solution TS-SU-755HF High Flow Billet Thermostat Housing is the best performance upgrade for Subaru EJ engines seeking improved coolant flow, faster warm-up, and enhanced reliability under high-boost or track conditions. CNC-machined from premium 6061-T6 billet aluminum with a larger internal passage design, this housing eliminates the restrictive factory plastic unit prone to cracking and flow restriction ideal for WRX/STI, Legacy GT, Forester XT, or any EJ-series turbocharged build where consistent cooling and thermostat function are critical for preventing overheating and maximizing engine longevity.
Key Features
- High Flow Design: Enlarged internal passages for improved coolant circulation and reduced restriction
- Billet 6061-T6 Aluminum: Lightweight, strong, and corrosion-resistant far superior to factory plastic
- Precision CNC Machined: Perfect fitment with OEM-style thermostat and gasket surface
- Black Anodized Finish: Sleek, durable coating with Torque Solution branding for clean engine bay look
- Direct Bolt-On Fit: Replaces factory housing uses stock thermostat, gasket, and mounting points
- Torque Solution Quality: Trusted in Subaru performance engineered for high-boost and track reliability
Specifications
| Specification | Detail |
|---|---|
| Part Number | TS-SU-755HF |
| Material | 6061-T6 Billet Aluminum |
| Finish | Black Anodized |
| Compatibility | Subaru EJ Engines (EJ20, EJ25 – WRX/STI, Legacy GT, Forester XT) |
| Installation | Direct Bolt-On (Uses Factory Thermostat & Gasket) |
| Country of Origin | United States |
| Warranty | Limited Lifetime (Torque Solution) |
| Shipping Weight | Approx. 1-2 lbs |
Product Notes
- High flow thermostat housing eliminates factory plastic failure and restriction
- Improves coolant flow for better temperature control under boost or track use
- Uses stock thermostat and gasket no additional parts required
Installation Notes
- Estimated time: 30-60 minutes, easy difficulty, basic hand tools required
- Drain coolant, remove factory housing, install new billet unit with stock thermostat/gasket, torque to spec
- Refill coolant and bleed system professional installation optional
This Part Fits
| Year | Make | Model | Notes |
|---|---|---|---|
| 1992-2021 | Subaru | Impreza WRX / WRX STI | EJ20 / EJ25 Engines |
| 2004-2009 | Subaru | Legacy GT / Outback XT | EJ255 / EJ257 Engines |
| 2003-2014 | Subaru | Forester XT | EJ25 Turbo Engines |
| Various | Subaru | EJ Series Swaps | Custom Turbo Builds |
Why Choose Torque Solution High Flow Billet Thermostat Housing?
- High flow design eliminates factory restriction better cooling and temperature stability
- Billet aluminum construction prevents cracking common with stock plastic housings
- Limited lifetime warranty trusted upgrade for Subaru EJ performance builds
Frequently Asked Questions
- Q: Will this housing fit my 2015 Subaru WRX STI EJ257?
A: Yes, Torque Solution TS-SU-755HF fits all Subaru EJ20/EJ25 engines (WRX/STI, Legacy GT, Forester XT). - Q: Do I need a new thermostat?
A: No, uses factory thermostat and gasket for direct replacement. - Q: Does it improve cooling?
A: Yes, larger passages reduce restriction and improve coolant flow under boost. - Q: What is the warranty?
A: Covered by Torque Solution Limited Lifetime Warranty built to last.
Shipping & Handling
- Method: UPS/FedEx Ground
- Availability: In stock – ships same or next business day
- Packaging: Secure protective packaging
- Weight: Approx. 1-2 lbs
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