Mishimoto MMRAD-WRX-01 Performance Aluminum Radiator
- 2001-2007 Subaru WRX and STI
- All-aluminum, brazed core, TIG-welded end tanks
- 1.3 bar high-pressure cap included
- Complete bolt-in replacement
- Lifetime warranty
- 15 pounds, silver
Last refreshed Oct 2, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A bolt-in aluminum radiator with welded tanks, made for the Subaru WRX and STI years it lists. It only covers the listed years and models.
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ASIN: B003GZJBQKModel: MMRAD-WRX-01Category: Radiators
Overview
Not a plastic-tank replacement, this Mishimoto radiator pairs a brazed aluminum core with TIG-welded aluminum end tanks. A pressure cap is supplied, and the radiator drops in without modification.
Mishimoto says the stock radiator's plastic tanks are prone to cracking, and this unit adds coolant capacity for hard driving. The fit list is narrow, and the dimensions in the listing look unreliable.
Who it's for
Owners of the listed Subarus who drive hard, track the car or want a longer-life cooling core. Owners of other Subarus have no listed support.
Pros and cons
- Welded end tanks
- Higher pressure cap included
- Complete bolt-in design
- Narrow vehicle range
- Listed dimensions look unreliable
- Core thickness not stated
Performance notes
Aluminum conducts heat quickly and tolerates higher pressure, and the high-pressure cap raises the coolant's boiling point. Greater coolant capacity helps hold safe temperatures under sustained hard driving.
Specifications
| Brand | Mishimoto |
|---|---|
| Model | MMRAD-WRX-01 |
| Dimensions & fit | |
| Item weight | 15 pounds |
| Overall Size | 28.4" x 17.2" x 2.15 / Core Size: 13.54" x 27.24" / Rows: 2 |
| Construction & materials | |
| Material | Aluminum |
| Core and tanks | 100% brazed aluminum core, TIG-welded end tanks |
| Color | Silver |
| Exterior finish | Machined |
| Compatibility & installation | |
| Compatible vehicles | Subaru WRX and STI 2001-2007 |
| Warranty & support | |
| Warranty | Mishimoto Lifetime Warranty |
| Other details | |
| Cap pressure | 1.3 bar, included |
| Inlet & Outlet | 1.5" / Core Thickness: 1.65" / Tank Wall Thickness: 0.08" |
Frequently asked questions
What is included with the Mishimoto MMRAD-WRX-01?
The radiator and a 1.3 bar high-pressure radiator cap. The listing does not mention hoses or hardware.
Is the Mishimoto MMRAD-WRX-01 a drop-in fit?
Yes. The description calls it a complete bolt-in unit that replaces the factory radiator without modification.
Which years does it fit?
The listing covers the 2001-2007 Subaru WRX and STI.