SKU: MMRAD-STI-08X | UPC: 748354803488
Mishimoto 2008+ Subaru WRX/STI X-LINE (Thicker Core) Aluminum Radiator
Replace your stock radiator with the Mishimoto X-Line Aluminum Radiator MMRAD-STI-08X, featuring a 42mm thick 2-row core for 50 percent more volume than OEM. This direct-fit upgrade cools 2008-2021 Subaru WRX/STI models, plus Legacy GT, Outback XT, Forester XT, and Impreza variants with EJ25 turbo engines. It handles high-heat track sessions and daily driving by rejecting more heat from coolant.
Key Features
- 42mm X-Line Core: Proprietary tube-and-fin layout with 24.8 x 16.5 x 1.65-inch dimensions expands surface area for faster heat dissipation and lower operating temps
- All-Aluminum Build: TIG-welded assembly with billet end tanks resists corrosion and weighs 12.8 lbs, lighter than stock while adding durability
- Direct-Fit Design: CNC-machined inlet/outlet fittings match OEM sizes and positions, bolts to factory mounts with no cutting or fabrication
- Transmission Cooler Ready: Includes OEM-style ports for easy integration of stock or aftermarket coolers
- Lifetime Warranty: Mishimoto stands behind every radiator with unlimited-mileage protection against defects
Product Notes
- Verify fitment using the application guide for your exact engine code (TY757/TY758/TY856)
- Pair with Mishimoto hoses and fans for full cooling system refresh
- Oversized item ships via freight or UPS with adult signature required
Installation Notes
- Professional installation recommended.
- Drain coolant, remove OEM radiator, and transfer fans/sensors. full install takes 1-2 hours
- Compatible with OEM brackets, A/C condenser, and shroud. reuse factory hardware
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2009 | Subaru | Forester | XT |
| 2009-2010 | Subaru | Forester | XT Limited |
| 2011-2013 | Subaru | Forester | XT Touring |
| 2009-2010 | Subaru | Impreza | 2.5 GT |
| 2008-2014 | Subaru | Impreza | WRX |
| 2010-2014 | Subaru | Impreza | WRX Limited |
| 2009-2014 | Subaru | Impreza | WRX Premium |
| 2008-2014 | Subaru | Impreza | WRX STI |
| 2011-2014 | Subaru | Impreza | WRX STI Limited |
| 2010 | Subaru | Impreza | WRX STI Special Edition |
| 2005-2006 | Subaru | Legacy | GT |
| 2005,2007-2009 | Subaru | Legacy | GT Limited |
| 2006-2009 | Subaru | Legacy | GT spec.B |
| 2005-2006 | Subaru | Outback | XT |
| 2005-2009 | Subaru | Outback | XT Limited |
| 2015-2021 | Subaru | WRX STI | Base |
| 2015 | Subaru | WRX STI | Launch Edition |
| 2015-2021 | Subaru | WRX STI | Limited |
| 2020 | Subaru | WRX STI | S209 |
| 2016 | Subaru | WRX STI | Series.HyperBlue |
| 2018 | Subaru | WRX STI | Type RA |
Why Choose Mishimoto?
- Engineered and tested in the USA for Subaru turbo applications
- Every part undergoes rigorous dyno and track validation
- Full range of matching cooling components available
Frequently Asked Questions
- Q: Will this fit my 2015 WRX STI?
A: Yes, MMRAD-STI-08X is confirmed direct-fit for 2015-2021 WRX STI Base, Limited, Launch Edition, S209, Series.HyperBlue, and Type RA models - Q: What is the core material and thickness?
A: Full 6061 aluminum construction with 42mm thick X-Line core, doubling heat rejection surface over stock 28mm unit - Q: What warranty applies?
A: Lifetime warranty covers manufacturing defects for the original purchaser with proof of installation
Shipping & Handling
- Method: UPS Ground or Freight for oversized items
- Availability: In stock – ships same or next business day
- Packaging: Securely boxed at 32 x 20 x 6 inches
- Weight: 12.8 lbs product, 16 lbs shipping
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