SKU: 1499-RA094
HKS Flange Wastegate Manifold-Side STD Subaru WRX STI 2004-2021
This HKS flange connects the wastegate to the manifold side in standard configuration for seamless integration on Subaru WRX STI models from 2004 to 2021. It fits HKS turbo manifolds delivering reliable exhaust flow and precise boost management for EJ25 engines. Expect consistent power gains with this direct-fit component designed for high-performance turbo setups.
Key Features
- Stainless Steel Construction: Resists corrosion and endures extreme exhaust temperatures up to 1600°F for long-term durability in turbo applications.
- CNC Precision Machined: Ensures exact flange alignment and bolt hole accuracy for hassle-free installation without leaks.
- Standard Wastegate Port: Matches T3 divided flange specs common on HKS GT2 GT3 and GTIII manifolds for broad wastegate compatibility.
- Direct HKS Manifold Fit: Bolts perfectly to HKS downpipe and manifold kits designed for Subaru STI turbo setups.
- Lightweight Design: Weighs only 0.5 lbs reducing underhood mass while maintaining structural integrity under boost pressure.
Product Notes
- Compatible only with HKS manifolds featuring standard wastegate provision verify your setup before purchase.
- Pair with high-temperature gasket and anti-seize on bolts for optimal sealing.
- Packaged in protective foam-lined box to prevent shipping damage.
Installation Notes
- Professional installation recommended.
- Torque manifold bolts to 22-25 ft-lbs using M8 hardware in a crisscross pattern.
- Requires matching T3 wastegate flange use copper gasket for best results.
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2004-2021 | Subaru | Impreza WRX STI | Sedan Hatchback |
| 2004-2007 | Subaru | Impreza WRX STI | Base |
| 2008-2014 | Subaru | Impreza WRX STI | Hatchback Base Limited |
| 2015-2021 | Subaru | WRX STI | Base Limited EyeSight |
| 2004-2008 | Subaru | Forester STI | All |
Why Choose HKS?
- 50+ years of JDM motorsport engineering from Japanese factories.
- Proven in WRX STI rally and track applications worldwide.
- Made with exact tolerances for Subaru turbo systems.
Frequently Asked Questions
- Q: Does this flange fit all Subaru STI models from 2004-2021?
A: Yes it bolts to HKS turbo manifolds on EJ257-equipped Impreza WRX STI sedan hatchback and Forester STI confirm your manifold has STD wastegate port. - Q: What material is the HKS 1499-RA094 flange?
A: High-grade 304 stainless steel machined for heat resistance and strength in high-boost exhaust environments. - Q: What warranty covers this part and installation tips?
A: HKS offers defect warranty contact dealer for details. Install with new gasket torque to spec for leak-free performance.
Shipping & Handling
- Method: UPS Ground or USPS Priority
- Availability: In stock – ships same or next business day
- Packaging: Foam-protected box 6 x 6 x 1 inches
- Weight: 0.5 lbs
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