SKU: TS-0550-3082 | UPC: 9329677020311
Turbosmart WG38/40 5psi Grey Inner Spring
The Turbosmart WG38/40 5psi Grey Inner Spring provides exact 5 PSI actuation pressure for wastegate valves measuring 38mm or 40mm. It fits Turbosmart wastegate actuators used across performance vehicles like Subaru WRX STI Mitsubishi Lancer Evolution and Nissan Silvia for consistent low-boost control. Built to maintain steady boost levels this spring supports reliable turbo operation in demanding conditions.
Key Features
- 5 PSI Actuation: Opens wastegate precisely at 5 PSI ideal for street and mild track applications with low boost requirements
- Grey Color Coding: Quick visual identification ensures correct spring selection during setup or maintenance
- WG38/40 Compatibility: Direct fit for all Turbosmart 38mm and 40mm wastegate series including compact plumb back and race port models
- High-Tensile Steel: Resists fatigue and deformation for repeated cycles and long-term durability in high-heat environments
- Precision Manufacturing: Hand-assembled in Australia with rigorous testing for consistent performance every time
Product Notes
- Use as inner spring pair with outer springs for adjustable boost up to 26 PSI total
- Check actuator diaphragm condition prior to spring replacement
- Lightweight design ships quickly without hazmat restrictions
Installation Notes
- Professional installation recommended.
- Depressurize system remove actuator cap and swap springs in under 10 minutes
- Fits standard Turbosmart hardware no adapters or modifications required
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2002-2021 | Subaru | Impreza | WRX STI |
| 2003-2006 | Mitsubishi | Lancer | Evolution VIII/IX |
| 1989-2002 | Nissan | Silvia/240SX | S13/S14/S15 |
| 1993-1998 | Toyota | Supra | MKIV Turbo |
| Universal | Various | Turbo Vehicles | With WG38/40 Wastegates |
Why Choose Turbosmart?
- Designed and built in Sydney Australia since 1997 with motorsport-proven reliability
- Strict quality control and in-house testing exceed industry standards
- Innovative engineering from dedicated research facility ensures dependable results
Frequently Asked Questions
- Q: What wastegate models use this spring?
A: Fits all Turbosmart WG38 and WG40 actuators such as GenV Compact Internal Plumb Back and Race Port series with 38mm or 40mm valves - Q: What material is the spring made from?
A: High-tensile spring steel engineered for heat resistance and thousands of actuation cycles without sagging - Q: What warranty coverage applies?
A: Covered under Turbosmart limited lifetime warranty on manufacturing defects register product for full support
Shipping & Handling
- Method: USPS First Class or UPS Ground
- Availability: In stock – ships same or next business day
- Packaging: Compact 4 x 3 x 1 inch protective box
- Weight: 0.11 lbs
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