Mishimoto MMRAD-WRX-01 Performance Aluminum Radiator
$349.26 price checked August 2026
If you own a 2001-2007 Subaru WRX or STI and need a direct fit, this is the one.
The Mishimoto MMRAD-WRX-01 in Short
The Mishimoto MMRAD-WRX-01 Radiator is for Subaru WRX/STI owners who need a high-capacity 2-row cooling solution with a 1.65″ core thickness.
Overheating during spirited driving can lead to engine damage or a complete breakdown on the road. A radiator that cannot dissipate heat quickly enough fails to maintain the safe operating temperatures required for high-performance engines.
The Mishimoto MMRAD-WRX-01 provides a high-capacity cooling solution featuring a 1.65″ core thickness. This specific measurement allows for more efficient heat exchange than standard replacement units, ensuring the cooling system keeps up with increased demands.
We evaluated the car radiator options we compared to identify the best fit for specific vehicle needs. This review is for Subaru owners looking for a direct-fit performance upgrade that meets OEM mounting standards.
How Car Forum World picked: we started from the 200 most-reviewed car radiator listings in our retail dataset, removed duplicates, accessories and off-category products, and 131 qualified. This product is one of 10 from that pool chosen for a full review. Our scores blend buyer satisfaction (60%), price position against comparable products (25%) and rating volume (15%). Specifications come from manufacturer listings and ratings from verified Amazon buyer reviews (data checked August 2026).
The Short Answer on the Mishimoto MMRAD-WRX-01
Best for: you need a performance upgrade for a 2001-2007 Subaru WRX or STI that requires a direct-fit aluminum core.
The Mishimoto MMRAD-WRX-01 is a strong choice at the $349.26 price point.
- Pro: The 1.65″ core thickness provides a significant surface area for heat dissipation compared to standard stock units.
- Pro: 1.5″ inlet and outlet diameters ensure high-volume coolant flow and reduced pressure drop.
- Pro: The 2-row construction offers a balanced weight-to-cooling ratio for street and track use.
- Con: The 0.08″ tank wall thickness is relatively thin, requiring careful inspection for any signs of manufacturing defects.
- Con: The 2-row design does not reach the extreme cooling capacities of high-performance racing radiators used for heavy-duty competition.
Don’t buy this if: your vehicle is not a 2001-2007 Subaru WRX or STI, as this unit will not fit without significant modification.
Price assessment: At $349.26, the price is fair for a branded, direct-fit aluminum radiator with these specific dimensions.
Car Forum World score: 6.8/10 (data-driven – see “How we picked” above)
If you are looking for a different Subaru option, see our full Mishimoto MMRAD-F2D-03 review.
Proper cooling requires understanding how to choose your radiator outlet diameter.
Key Specifications
| Compatible Vehicles | 2001-2007 Subaru WRX/STI |
| Material | Aluminum |
| Core Thickness | 1.65″ |
| Rows | 2 |
| Inlet & Outlet Diameter | 1.5″ |
| Core Width | 27.24″ |
| Overall Size | 28.4″ x 17.2″ x 2.15″ |
| Item Weight | 14.85 pounds |
The 1.65″ core thickness provides a balance of heat dissipation and flow for 2001-2007 Subaru WRX/STI owners seeking a direct-fit aluminum upgrade.
Where this sits in the buyer data: Among the 131 products screened for this category, this one’s 4.5 rating places it #9, on 224 ratings – above the 70-rating median of that group, so the average rests on more feedback than most of its comparables. On price it undercuts 10 of them.
Before You Buy: Mishimoto MMRAD-WRX-01 Checklist
The first thing to check is whether your specific vehicle year and model matches the 2001-2007 Subaru WRX/STI fitment requirements.
- ✅ Confirm your radiator width clearance — 28.4″ wide
- ✅ Verify your core height requirements — 13.54″ x 27.24″
- ✅ Check your inlet and outlet diameters — 1.5″
- ✅ Measure your available depth — 2.15″ total thickness
- ✅ Confirm your row requirements — 2 rows
You should not buy this radiator if your specific front-mount intercooler setup or front bumper limits the available width to less than 28.4 inches, as the Mishimoto MMRAD-WRX-01 will not clear the front end without modification. Because the specifications do not list included brackets, you must verify that your existing mounting points align with the 2001-2007 Subaru WRX/STI factory layout before ordering. A qualified installer should perform the installation to ensure all connections meet local safety standards.
What the Numbers Mean in Use
2-Row Core Configuration
The Mishimoto MMRAD-WRX-01 features a 2-row core configuration, which dictates the volume of coolant the radiator can process. While high-performance racing radiators often utilize 3-row designs for extreme heat dissipation, a 2-row setup provides a balance of cooling capacity and weight for street and spirited driving.
This core configuration allows you to manage heat soak during heavy track use by providing sufficient surface area for heat exchange. Because the 2-row design maintains a manageable profile, you can expect consistent cooling performance without the extreme weight penalties of larger racing units.
1.5 Inch Inlet and Outlet Ports
The 1.5 inch inlet and outlet ports on the Mishimoto MMRAD-WRX-01 determine the flow rate of the cooling system. These dimensions align with standard OEM requirements for this application, ensuring that the radiator does not create a flow restriction that could lead to engine overheating.
Standardizing these ports ensures that your cooling system maintains sufficient pressure and flow volume. You can rely on these 1.5 inch connections to support the high-flow requirements of a turbocharged engine under load.
Specific Subaru Fitment
The Mishimoto MMRAD-WRX-01 is designed as a direct fit for 2001-2007 Subaru WRX/STI models. This specific fitment means the mounting points and hose locations align with factory specifications, reducing the risk of a mounting mismatch that requires custom brackets.
Because this unit is built for your specific vehicle, you can ensure the 28.4″ x 17.2″ x 2.15″ dimensions clear the engine bay. Before ordering, you must confirm your vehicle’s specific year and model to ensure the mounting points match your chassis exactly. A qualified installer should perform the final installation to ensure all connections meet local requirements.
New buyers should first view the different types of radiators explained.
How the Mishimoto MMRAD-WRX-01 Compares to Alternatives
The Mishimoto MMRAD-WRX-01 Performance Aluminum Radiator ranks first in our review for its 4.5 rating, the highest among the six options we compared.
- The Mishimoto MMRAD-WRX-01 costs $1.24 less than the Mishimoto Dodge Ram 2500 3500 Cummins Radiator.
- The Mishimoto MMRAD-WRX-01 costs $9.74 less than the Primecooling 3 Row Aluminum Radiator Chevy GMC.
- The ALLOYWORKS 4 Row Aluminum Radiator Chevy C K costs $18.26 less than the Mishimoto MMRAD-WRX-01.
- The 3 Row Aluminum Radiator Ford F250 F350 F450 costs $4.66 less than the Mishimoto MMRAD-WRX-01.
While the Mishimoto MMRAD-WRX-01 provides a slim 2-row profile for the WRX/STI, you should check the specific flow rate of your engine’s cooling loop before choosing it over a 3-row unit. Because the data for this model does not specify a flow rate, you must confirm that a 2-row core meets your thermal requirements before installation. If you need the highest possible cooling volume for a heavy-duty application, the 3 Row Aluminum Radiator Ford F250 F350 F450 is the better pick for its increased row count.
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What Buyers Still Want to Know About the Mishimoto MMRAD-WRX-01
Frequently Asked Questions
Is the Mishimoto MMRAD-WRX-01 worth the extra cost over a standard OEM replacement?
The Mishimoto MMRAD-WRX-01 justifies its price through high-performance aluminum construction designed for better heat transfer than standard units. You can expect a more efficient cooling core that handles the thermal demands of a Subaru WRX/STI better than basic replacements.
How does the tank wall thickness affect durability under high pressure?
The Mishimoto MMRAD-WRX-01 features a 0.08″ tank wall thickness to maintain structural integrity under operating pressures. You should confirm your specific cooling requirements with a professional installer to ensure this thickness meets your vehicle’s high-pressure needs.
Will the Mishimoto MMRAD-WRX-01 fit a 2005 Subaru WRX?
Yes, this radiator is a direct fit for 2001-2007 Subaru WRX/STI models. The 28.4″ x 17.2″ x 2.15″ dimensions align with the original equipment manufacturer specifications for those years.
Is the Mishimoto MMRAD-WRX-01 the best choice for high-performance cooling?
If you require a 2-row core with a 1.65″ thickness, the Mishimoto MMRAD-WRX-01 provides a significant upgrade over stock components. It holds a 4.5 rating from 224 buyers who prioritize its performance over standard options.
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Is the Mishimoto MMRAD-WRX-01 Right for You?
The Mishimoto MMRAD-WRX-01 suits 4 kinds of buyer and is the wrong choice for 3 jobs, listed below with the reason for each.
Who the Mishimoto MMRAD-WRX-01 is for, and what it does well
Who the Mishimoto MMRAD-WRX-01 suits
- Subaru WRX owners from 2001-2007 — direct fit for their specific vehicle generation
- Street racers — 2-row aluminum construction for efficient heat dissipation during high-load driving
- Subaru STI owners — high-performance aluminum material for improved cooling over stock units
- Track day hobbyists — 1.65-inch core thickness to manage engine temperatures during sustained high-RPM use
What the Mishimoto MMRAD-WRX-01 handles well
- Replacing a stock radiator — direct fit for 2001-2007 Subaru WRX/STI
- High-performance cooling — aluminum construction and 2-row design
- High-flow cooling systems — 1.5-inch inlet and outlet diameters
- Tight engine bay installations — 2.15-inch overall thickness
What the Mishimoto MMRAD-WRX-01 is the wrong choice for
- Extreme heavy-duty towing — 2-row design may lack the capacity of 3-row units
- Ultra-high pressure racing — 0.08-inch tank wall thickness limits extreme pressure tolerances
- Large-diameter custom plumbing — 1.5-inch inlet and outlet diameters limit oversized hose connections
What to budget alongside the Mishimoto MMRAD-WRX-01, and what to skip
Worth buying at the same time
- Radiator coolant — necessary fluid to fill the 13.54″ x 27.24″ core
- Radiator cap — required to maintain pressure for the 0.08-inch tank walls
- Hoses — required to connect to the 1.5-inch inlet and outlet ports
- Mounting brackets — required to secure the 28.4″ x 17.2″ x 2.15″ unit
- Cooling fan — necessary to pull air through the 2-row core
What you can skip
- Adapter plates — not needed due to the direct fit for 2001-2007 Subaru WRX/STI
- Universal radiator brackets — unnecessary because of the specific direct fit design
Where to Buy the Mishimoto MMRAD-WRX-01
These retailers sell Car Radiator generally – we do not track which of them has this particular model in stock, so check availability and the current price with the retailer before making a trip.
- Summit Racing Equipment (online only) — huge breadth of performance and aftermarket cooling brands
- Jegs (online only) — extensive catalog of high-performance and specialty cooling systems
- RockAuto (online only) — massive inventory of budget-friendly and OEM-equivalent parts
- ExtremeTerrain (online only) — specialist for off-road and truck-specific cooling upgrades
- AutoZone (online and physical stores) — in-store returns and local pickup for standard replacement parts
- O’Reilly Auto Parts (online and physical stores) — local availability and professional staff for diagnostic help
- Advance Auto Parts (online and physical stores) — wide selection of standard cooling components and local pickup
Final Verdict on the Mishimoto MMRAD-WRX-01
You need a direct fit for a 2001-2007 Subaru WRX or STI that provides significant cooling surface area without requiring custom fabrication. The Mishimoto MMRAD-WRX-01 is the recommended choice at around $349.26.
The Mishimoto MMRAD-WRX-01 features a 27.24″ core width and a 1.65″ core thickness, providing a robust cooling surface that meets the demands of high-performance applications. It also maintains a 4.5 rating from 224 buyers.
Skip it if: your vehicle requires a 3-row cooling core or if you need a radiator with a different inlet diameter than 1.5″.