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The Mishimoto Aluminum Radiator Stay replaces the factory plastic support on 2008+ Subaru Impreza WRX and STI models with a durable billet aluminum design. This anodized black stay prevents radiator sagging under high heat and boost pressure for consistent cooling performance.
Key Features
- Billet 6061 Aluminum Construction: Provides strength far beyond OEM plastic to handle turbocharged demands and track abuse.
- Direct Bolt-On Fit: Uses factory mounting points on compatible Subaru models with no cutting or drilling.
- CNC Machined Precision: Ensures perfect alignment for OEM or aftermarket radiators.
- Anodized Black Finish: Resists corrosion and adds clean style to the engine bay.
- Compatible with stock and Mishimoto aluminum radiators.
- Direct-fit parts backed by real-world dyno data.
Fitment
| Years | Make | Model | Application Notes |
|---|---|---|---|
| 2008-2014 | Subaru | Impreza | 2.5 GT, 2.5i, 2.5i Premium, Outback Sport, WRX, WRX Limited, WRX Premium, WRX STI Limited, WRX STI Special Edition |
| 2005-2009 | Subaru | Legacy | 2.5i, 2.5i Limited, 2.5i Special Edition, 3.0 R, GT, GT Limited, GT spec.B, Limited, i |
| 2005-2009 | Subaru | Outback | 2.5i, 2.5i Basic, 2.5i Limited, 2.5i Limited L.L. Bean Edition, 2.5i Special Edition, 3.0 R Limited, Base, Limited, R L.L. Bean Edition, R VDC Limited, VDC Limited, XT, XT Limited, i |
Specifications
| Brand | Mishimoto |
|---|---|
| Manufacturer Part Number | MMRS-STI-08B |
| Product Type | Radiator Stays |
| Fitment Type | Vehicle Specific |
| GTIN | 748354010596 |
| Condition | New |
What's Included
One new Mishimoto radiator stays identified by manufacturer part number MMRS-STI-08B. Hardware, adapters, hoses, clamps, fluids, wiring, tools, and companion parts are included only when expressly supplied for this exact part number.
About Mishimoto
Mishimoto develops automotive cooling, intake, oil-management, exhaust, drivetrain, and vehicle-accessory products. Fitment, dimensions, interfaces, and included components remain exact-part-number specific.
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Frequently Asked Questions
Will this Mishimoto product fit my 2008-2014 Subaru Impreza?
That vehicle range is listed, but confirm the engine, body configuration, production date, factory interfaces, and every current Mishimoto application note for this exact part number.
What specifications should I verify before ordering?
Confirm every listed dimension, connection, thread, material, finish, quantity, mounting point, and companion-part requirement for the exact part number.
What is included with this Mishimoto product?
Only the exact product and hardware expressly supplied for this part number are included. Fluids, adapters, tools, and companion components are separate unless stated otherwise.
Installation Instructions
Follow the current Mishimoto instructions and vehicle service information for part number MMRS-STI-08B. Verify every interface and clearance, work on a cool and safely supported vehicle, use the specified fluids, fasteners, seals, and torque procedures, inspect for leaks or contact, and recheck the installation after the first heat cycle.
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