Specifications
Part Details:
Fitment note: manual transmission only. This radiator does not fit CVT or automatic transmission vehicles. Confirm your transmission type before ordering.
The factory radiator on these Subaru platforms becomes brittle and prone to cracking as it ages, and even in good condition it can struggle to keep up with a modified, higher-power build. This Koyo all-aluminum racing radiator is a true plug-and-play upgrade, requiring no engine modifications and retaining the mounts for the factory fan shrouds and fans, while delivering meaningfully better cooling performance than the stock unit.
Hand-crafted heliarc welds reinforce every aluminum connection, and precise tube and fin alignment promotes optimal coolant flow with highly efficient heat transfer. Real-world owners report coolant temperature drops of 5 to 10 degrees in extreme ambient heat compared to the factory radiator. The billet filler neck is precision machined for durability, and the upper radiator hose may require minor trimming for proper clearance during installation.
Key Features
- Fits 2008 to 2021 Subaru WRX and STI, 2005 to 2009 Legacy GT, manual transmission only
- Full aluminum construction, true plug-and-play installation
- No engine modifications necessary, retains factory fan shroud and fan mounts
- Hand-crafted heliarc welds for stronger, more durable connections
- Precise tube and fin alignment for optimal coolant flow and heat transfer
- Billet filler neck, precision machined
- Radiator cap sold separately
- Upper radiator hose may require minor trimming for proper clearance
Frequently Asked Questions
Does this fit an automatic or CVT transmission car?
No, this radiator is designed for manual transmission vehicles only and does not fit CVT or automatic applications.
Is any cutting or modification required to install this?
No, it is a true plug-and-play replacement, though the upper radiator hose may need minor trimming for proper clearance.
Is the radiator cap included?
No, the radiator cap is sold separately. The Koyo SK-C13 cap is recommended, though the factory OE cap will also fit.
Recommended Supporting Components
- WRX Bolt-On Upgrades explore cooling components for your WRX build.
- STI Bolt-On Upgrades explore cooling components for your STI build.
- Upgraded Radiators for WRX and STI: When You Actually Need One not sure if you need this upgrade yet? Start here.
- WRX Cooling Mods: Radiator vs Intercooler vs Oil Cooler understand where this fits into a full cooling upgrade plan.
- How Much Cooling Capacity Does a Modified WRX or STI Actually Need planning a bigger power build? Check this first.
Why Buy Cooling Upgrades from Wrench Masters?
Wrench Masters carries the cooling upgrades that protect a modified engine from heat-related failure, not just the parts that add power. A cracked stock radiator has stranded plenty of owners, this is proven insurance against that.
Shipping
Shipping Options:
WrenchMastersAuto.com ships your performance parts safely, quickly and conveniently nationwide via the most trusted shipping carriers such as: UPS, Fed Ex, USPS, and DHL.
Delivery Times:
- In Stock: 3-7 Business Days
- Custom Orders: 2-6 Weeks, Please Email: [email protected] or Call: 727-565-9808 for Questions.
Enjoy FREE SHIPPING on most orders over $199!
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