Click to zoom in
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
Fabrication
Shop Fabrication Parts and Materials at Black Ops Auto Works for stainless steel tubing, titanium tubing, aluminum charge piping, mandrel bends, V-band clamps, flanges, merge collectors, AN fittings, PTFE hose kits, braided fuel and oil lines, heat shields, welding supplies, brackets, bungs, and hardware for building custom exhaust systems, turbo plumbing, intercooler piping, and fuel system routing. Start with tubing in stainless, titanium, or aluminum in the right diameter and wall thickness, then add mandrel bends, flanges, V-bands, and clamps to complete the joint work. Black Ops Auto Works carries 5,866 fabrication SKUs from Vibrant Performance, Ticon Industries, Stainless Bros, Radium Engineering, Fragola, DEI, and ATP Turbo. Why Custom Fabrication Custom fabrication solves fitment problems that no universal or pre-bent kit can address. Raw tubing, flanges, and fittings give the fabricator freedom to route exhaust around a turbo, snake charge pipe around accessories, hard-...
View Fabrication Products
Flanges
Exhaust flanges and V-band hardware for custom fabrication and performance exhaust builds are stocked at Black Ops Auto Works. Shop laser-cut stainless steel flanges, V-band flange pairs, OEM-pattern manifold flanges, turbo outlet flanges, and flex couplings for GM LS, Ford Coyote, Chrysler HEMI, and import turbocharged platforms. Every product is filterable by inside diameter, outside diameter, flange face style, and bolt pattern so the correct flange ships the first time. Black Ops Auto Works carries 452 flange SKUs across bolt-on and V-band styles. What This Category Covers Exhaust flanges are the bolted connection points where exhaust manifolds mate to downpipes, where sections of exhaust pipe join at catalytic converters and muffler inlets, and where aftermarket headers connect to factory or custom collector sections. Flange quality and correct material specification are critical for maintaining leak-free exhaust connections under the extreme temperature cycling that perfor...
View Flanges Products
HKS
HKS Japanese performance parts for Toyota Supra, Nissan Skyline GT-R, Nissan Silvia and 240SX, Subaru WRX and STI, and other JDM platforms are stocked at Black Ops Auto Works. Shop turbo kits, cat back exhaust systems, coilovers, blow off valves, and engine management upgrades for RB26DETT, SR20DET, 2JZ-GTE, and EJ series turbocharged engines. Every product is filterable by year, make, model, trim, engine, and drivetrain so the correct part ships the first time. Black Ops Auto Works carries 607 HKS SKUs across forced induction, exhaust, suspension, and engine management categories. What This Collection Covers HKS has built its reputation on Japanese sport compact and sports car performance since the late 1970s, developing turbo kits, exhaust systems, and suspension for platforms including the Toyota Supra 2JZ-GTE, Nissan Skyline GT-R RB26DETT, Nissan Silvia and 240SX SR20DET, and Subaru WRX and STI EJ and FA series engines. This collection brings together fitment verified HKS pa...
View HKS Products