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If your Subaru Impreza WRX is showing signs of overheating or slow warmups, the radiator is one of the most likely suspects. Choosing the right Subaru Impreza WRX radiator matters because fitment, core design, and materials all affect cooling capacity, leak resistance, and long-term reliability under boost or heavy load.This guide shortlists seven top radiator options built to address common WRX needs, from robust daily-driving reliability to higher-capacity cooling for performance use. We evaluate each option on cooling performance and fitment reliability, plus durability and ease of installation, so you can pick the radiator that best matches how you use your WRX.
Looking for other parts? See all Subaru Impreza parts & accessories.
Top Picks at a Glance
| Best Overall The best all-around choice for most situations | BDFHYK 2-Row 40mm Aluminum Radiator (MMRAD-STI-08) for Subaru 2.5L | ![]() |
| Best Quality Built to a higher standard if you want something more solid | Mishimoto Performance Aluminum Radiator for Subaru Impreza WRX/STI (2008–2019) | ![]() |
| Best Value The sweet spot between price and what you get | Alpaspare 2778 Direct-Fit Aluminum Radiator for Subaru (Fits select models 2005–2017) | ![]() |
| Best Budget The cheapest option that still gets the job done reliably | DNA Motoring Aluminum Replacement Radiator for Subaru WRX/Impreza (Manual, 2.5L Turbo) | ![]() |
| Highest Rated A top-rated pick with lots of positive feedback | A-Premium Engine Coolant Radiator Assembly for Subaru Impreza / WRX STI 2.5L | ![]() |
| Most Popular A crowd favorite that many people choose with confidence | YITAMOTOR Radiator for 2008–2016 Impreza and compatible Subaru models | ![]() |
| Best Seller A high-volume bestseller chosen again and again | DWVO Complete Radiator for Subaru Impreza/Forester/Legacy/Outback/Crosstrek (CU13092) | ![]() |
1. BDFHYK 2-Row 40mm Aluminum Radiator (MMRAD-STI-08) for Subaru 2.5L
| Model | MMRAD-STI-08 |
|---|---|
| Core | 2ROW-40MM |
| Material | AA5052 aluminum |
| Inlet/Outlet | 1.50" × 1.50" |
| Fitment | Subaru 2.5L Impreza/Legacy/Outback/WRX STI (listed years) |
This BDFHYK 2-row 40mm aluminium radiator is a direct-fit-style replacement for certain Subaru 2.5L models and is built for higher cooling capacity than many stock units. It uses AA5052-grade aluminum with brazed core construction, CNC-machined cap, and an OEM-style brass petcock drain for a more durable finish and easier maintenance. The tube-and-fin design and increased core thickness are claimed to boost heat dissipation by about 30 to 45 percent, which helps control engine temperatures under spirited driving or towing. Installation is typical for a factory-replacement radiator and should slot into the factory mounting points when matched to the listed models. Limitations include the aftermarket fit and finish variance that can require small adjustments during install and the fact that this is a 2-row core so extreme high-performance cooling setups may still prefer multi-row or dedicated race radiators. For drivers wanting a stronger cooling step up from a worn stock radiator without major vehicle modification, this is a practical upgrade.
Best for: Buyers who want a reliable, factory-replacement style upgrade that improves cooling for everyday driving and occasional spirited use without changing other cooling system components.
Less Ideal for: Racers or high‑boost builds needing maximum cooling capacity should consider larger multi-row or purpose-built race radiators instead.
- Aluminium AA5052 construction and brazed core for improved durability and heat transfer
- CNC-machined radiator cap and OEM-style brass petcock for reliable sealing and easier draining
- 2-row 40mm core and tube-and-fin design claim higher cooling efficiency than many stock radiators
- 100% leak tested and manufactured to automotive quality standards for consistent performance
- Aftermarket direct-fit parts can require minor trimming or bracket adjustments on some vehicles during installation
Verdict: A durable, higher-capacity factory-style aluminium radiator that gives Subaru 2.5L owners a noticeable cooling boost over a worn stock unit without major modifications.
2. Mishimoto Performance Aluminum Radiator for Subaru Impreza WRX/STI (2008–2019)
| Compatibility | Subaru Impreza WRX/STI 2008-2019 |
|---|---|
| Core Material | Aluminum |
| Mounting Type | Chassis Mount |
| Included Components | Radiator |
The Mishimoto performance aluminum radiator replaces the factory unit to deliver higher cooling capacity for spirited driving and track use. It uses a 100% brazed aluminum core with TIG-welded end tanks, a thicker core for increased thermal mass, a magnetic drain plug to capture metallic debris, and a high-pressure radiator cap to raise coolant boiling point. In practice this means lower operating temperatures under extended high-load conditions and reduced risk of heat-related power loss or overheating during hot weather or track sessions. Installation is intended to be a direct chassis-mount swap, keeping fitment and engine-bay appearance straightforward while adding a polished finish that cleans up the look under the hood. The radiator is focused on cooling performance and durability, so buyers should expect a firmer price and heavier construction compared with economy replacements and may need to reuse or source OEM brackets and hoses for a seamless install on heavily modified cars.
Best for: Enthusiasts who push their Subaru with spirited street driving or occasional track days and prioritize reliable engine cooling and longevity over lowest-cost replacements.
Less Ideal for: Drivers who only use their car for relaxed daily commuting and prefer the lowest-cost, simplest replacement option.
- Up to 30% improved cooling efficiency versus stock for lower coolant temps during high-load driving
- All-aluminum brazed construction with TIG-welded end tanks for corrosion resistance and strength
- Magnetic drain plug captures metallic particles to help protect the cooling system
- Thicker core increases thermal mass for more consistent temperature control under sustained stress
- May be heavier and pricier than basic replacement radiators
Verdict: Choose this Mishimoto radiator when you need a durable, higher-capacity factory-style cooling upgrade to keep a WRX/STI cooler during spirited driving and track use.
3. Alpaspare 2778 Direct-Fit Aluminum Radiator for Subaru (Fits select models 2005–2017)
| Compatible models | Select Subaru Crosstrek, Forester, Impreza, Legacy, Outback, WRX, XV (see fitment) |
|---|---|
| Material | Aluminum |
| Transmission | AT |
| Manufacturer | Alpaspare |
This Alpaspare 2778 is a direct replacement aluminum radiator built to drop into compatible Subaru models without modifications. It is used to replace a failed or leaking factory radiator and restore reliable engine cooling. The unit claims 1:1 fitment with original mounting points and hose connections, which simplifies installation for DIY mechanics and reduces shop time. Constructed from aluminum, the core is engineered for corrosion resistance and improved heat dissipation compared with older plastic-tank radiators. The listing highlights pressure, leak, and thermal-cycle testing to support long-term durability. Practical benefits include restoring proper operating temperature quickly during highway runs or spirited driving in a WRX, and compatibility with automatic transmissions as noted. Limitations are that fitment is vehicle-specific so confirm model year and transmission type before buying, and replacement tanks or sensors fitted to factory radiators may need transfer during installation since some OEM accessories are not mentioned as included.
Best for: Buyers who want a practical, no-frills replacement that restores factory cooling performance with minimal installation hassle and who prefer a durable aluminum unit over repaired or patched radiators.
Less Ideal for: Those seeking a high-capacity performance radiator with enlarged cores or aftermarket features for heavy track use should consider purpose-built performance options instead.
- Direct 1:1 fitment with original mounting points for compatible Subaru models, reducing installation work
- Aluminum construction for improved heat dissipation and corrosion resistance
- Factory-style inlet and outlet diameters and mounting reduce need for adapters or modifications
- Pressure and thermal-cycle testing claimed to help prevent leaks and ensure durability
- Compatibility limited to specified Subaru model years and configurations so must verify fitment before purchase
- Does not explicitly include additional hardware or sensor pieces that may need to be transferred from the old radiator
Verdict: A practical direct-fit aluminum replacement that restores factory cooling reliability for compatible Subaru Impreza WRX owners without complicated installation.
4. DNA Motoring Aluminum Replacement Radiator for Subaru WRX/Impreza (Manual, 2.5L Turbo)
| Fitment | WRX 2012-2014, Impreza 2008-2014 (2.5L Turbo, Manual) |
|---|---|
| Core material | T-6061 Aluminum |
| Inlet / Outlet | 1-9/16" / 1-9/16" |
| Position | Front |
This DNA Motoring aluminum radiator replaces the factory unit on manual 2.5L turbo Subaru WRX and Impreza models and is built to be a direct bolt-on replacement. Its full T-6061 aluminum tube-and-fin core is lightweight and increases surface area for faster heat dissipation, which the maker says improves cooling efficiency substantially versus a stock unit. Typical use is a like-for-like replacement when a radiator is leaking, damaged, or when you want better heat control under heavy driving. The inlet and outlet diameters match factory plumbing for straightforward hose connection, but installation instructions are not included so plan for a professional install or basic mechanical skill and tools. The radiator's construction offers corrosion resistance and a performance-oriented two-row core, yet buyers should note this is a direct replacement rather than a heavy-duty or race-spec unit and may not include mounting hardware or detailed guidance. For budget-focused owners who need reliable cooling without major modification, it provides a sensible balance of performance and value.
Best for: Practical owners looking for an affordable, factory-style replacement that improves cooling for daily driving and occasional spirited use without major modifications.
Less Ideal for: Drivers who need a heavy-duty, track-focused cooling solution or who want a plug-and-play kit with detailed instructions and included hardware.
- Full T-6061 aluminum core for improved heat transfer and lighter weight
- Direct bolt-on fitment for Subaru WRX 2012-2014 and Impreza 2008-2014 manual 2.5L turbo models
- Tube-and-fin design increases surface area to dissipate heat more efficiently
- Inlet and outlet diameters match factory plumbing for easier hose connections
- No installation instructions or supplied mounting hardware are included
- Not engineered as an extreme or race-spec radiator for track use
Verdict: A cost-conscious, full-aluminum direct-replacement radiator that noticeably improves cooling for manual 2.5L turbo Subaru WRX and Impreza owners without requiring modifications.
5. A-Premium Engine Coolant Radiator Assembly for Subaru Impreza / WRX STI 2.5L
| Vehicle fitment | Subaru Impreza 2008-2014, WRX STI 2014 H4 2.5L |
|---|---|
| Inlet diameter | 1-9/16 inch |
| Outlet diameter | 1-9/16 inch |
| Core thickness | 5/8 inch |
| Core height | 13-3/8 inch |
This A-Premium radiator is a factory-style replacement built to match the cooling capacity and fit of the original unit for Subaru Impreza (2008–2014) and WRX STI (2014) 2.5L H4 engines. It installs like a stock radiator and is typically used to replace a leaking, clogged, or damaged core to regain stable engine temperatures. Notable features include direct-fit mounting, matching inlet and outlet diameters, and a one-year unlimited-mileage guarantee. In practice the radiator should restore proper coolant flow and heat rejection when paired with correct hoses and mounting hardware, and the included specifications make it straightforward to confirm fitment. Limitations to consider are that this unit does not include a transmission oil cooler or engine oil cooler, so vehicles that relied on integrated coolers will need separate components. Buyers should also verify core size and connection diameters against their vehicle before ordering to ensure a hassle-free installation.
Best for: Buyers who prioritize restoring dependable, factory-quality cooling performance on a Subaru Impreza or WRX STI and want a straightforward replacement that fits like the original.
Less Ideal for: Owners seeking an upgraded high-performance or dual-purpose radiator with built-in oil or transmission coolers should look at specialized aftermarket options instead.
- Direct-fit design for Subaru Impreza 2008–2014 and WRX STI 2014 2.5L H4 which simplifies installation
- Matches inlet and outlet diameters to factory connections for straightforward hose attachment
- Core dimensions restore original coolant capacity and heat rejection for stable engine temperatures
- Backed by a one-year unlimited-mileage guarantee for added reliability confidence
- Does not include a transmission oil cooler or engine oil cooler if the vehicle requires integrated cooling
- Requires buyers to confirm core size and connection measurements to ensure exact fit
Verdict: A practical, direct-fit replacement that restores reliable factory-style cooling for Subaru Impreza and WRX STI 2.5L engines.
6. YITAMOTOR Radiator for 2008–2016 Impreza and compatible Subaru models
| Compatible engines | 2.0L, 2.5L |
|---|---|
| Core material | Aluminum |
| Tank material | Glass fiber reinforced nylon PA66 |
| OEM part numbers | 45111AG00A, 45111AG06A, 45111AJ07A, 45119SC000, F09TECS002 |
This YITAMOTOR radiator replaces the factory unit on compatible Subaru 2.0L and 2.5L models and is built around a high-density aluminum core with an integrated aluminum oil cooler for improved heat dissipation. It installs like a factory-style radiator and is intended for use as a full replacement to address overheating, leaks, or age-related cooling loss. The tank ends are made of glass fiber reinforced nylon PA66 and are seam-welded to reduce risk of cracks and leaks compared with cheaper molded tanks. The seller states the core increases cooling efficiency substantially and units are pressure tested and shipped with protective foam and cardboard. Important limits to know are that the radiator cap is not included and professional installation is recommended; fitment requires verifying exact vehicle years and engine size. If you need a straightforward, higher-capacity replacement that mirrors factory fit and boosts cooling, this is a practical option, but expect to supply the cap and consider shop installation for correct bleed and hose connections.
Best for: Buyers who prioritize reliable, factory-style replacements backed by positive real-world feedback and want to restore or improve cooling on specific Subaru 2.0L/2.5L models.
Less Ideal for: Do-it-yourselfers looking for a plug-and-play swap without sourcing a radiator cap or novice buyers who want a guaranteed no-shop-install option.
- Aluminum high-density core with larger fin area for improved heat dissipation
- Built-in aluminum oil cooler to help keep engine temperatures down
- Seamlessly welded glass fiber reinforced nylon PA66 tanks reduce crack and leak risk
- Designed to match factory-style fit for straightforward replacement
- Shipped pressure-tested and well packaged to reduce arrival damage
- Radiator cap is not included so you may need to reuse or buy a replacement cap
- Professional installation is recommended which adds labor cost and complexity
Verdict: A factory-style aluminum replacement radiator that improves cooling reliability for compatible Subaru 2.0L and 2.5L models while avoiding common plastic-tank failures.
7. DWVO Complete Radiator for Subaru Impreza/Forester/Legacy/Outback/Crosstrek (CU13092)
| Compatible engines | 2.0L and 2.5L |
|---|---|
| Core material | Aluminum |
| Tanks | PA66 GF30 inlet/outlet |
| Manufacturer part number | MADWVx6Z0v |
This DWVO complete radiator provides a direct OEM-fit replacement for certain Subaru 2.0L and 2.5L vehicles and is intended for use where a like-for-like radiator swap is needed. It features a high-density, multi-louvered aluminum core with TIG-welded connections and glass-filled PA66 inlet/outlet tanks to resist leaks and corrosion. The radiator arrives as a full assembly with protective corner foam and a user manual, though the radiator cap is not included. In practice this unit is used exactly like a factory replacement: remove the old radiator, install the DWVO unit, reconnect hoses and cooling lines, and refill coolant. Its construction aims to improve cooling efficiency and long-term durability in mixed driving conditions, which is reassuring for risk-averse buyers who want a dependable fix rather than an aftermarket performance upgrade. Expect professional installation for best results since fitment confirmation and proper mounting are important. The product does not include small accessories like the cap, so plan to reuse or source those separately.
Best for: A Subaru owner seeking a reliable, factory-style radiator replacement who prioritizes an exact-fit, durable part over performance modifications.
Less Ideal for: Drivers looking for high-performance or upgraded cooling solutions for racing or heavily modified engines should consider purpose-built performance radiators instead.
- Direct-fit design that matches multiple factory part numbers for straightforward replacement
- High-density multi-louvered aluminum core for improved cooling efficiency
- TIG-welded joints and PA66 GF30 inlet/outlet tanks for leak resistance and durability
- Protective packaging with fixed foam to reduce shipping damage
- Radiator cap is not included so an additional part may be required
- Professional installation recommended which adds labor time and cost
Verdict: A solid, factory-matching replacement radiator for Subaru 2.0L and 2.5L models that prioritizes reliable cooling and long-term durability.
Choosing the Right Subaru Impreza WRX Radiator: Key Factors to Consider
Cooling Capacity and Core Design
Cooling capacity determines how well the radiator dissipates engine heat in everyday driving and under higher loads. Core design factors like the number of rows, fin density, and tube cross-section change how much heat moves from coolant to air. For a Subaru Impreza WRX that may see spirited driving or towing, a thicker, multi-row core often lowers operating temperatures and reduces heat soak.
However, higher-capacity cores can add weight and may require more airflow to be effective. Consider the balance between core thickness and airflow availability behind the grille and fan. The right core design for your WRX should address your typical driving loads without creating fitment or clearance problems with the shroud, intercooler piping, or auxiliary components.
Material and Corrosion Resistance
Radiators are commonly constructed from aluminum cores with either plastic or aluminum tanks. Aluminum cores with full-metal tanks generally offer better long-term durability and resistance to heat-related deformation, while plastic tanks can be lighter and cost-effective but may be prone to cracking over many heat cycles.
Corrosion resistance matters because coolant chemistry and occasional neglect can accelerate deterioration. Look for proper brazing, quality coatings, and materials compatible with Subaru coolant to avoid premature failure. For WRX owners who operate in salted-road climates or track frequently, prioritizing corrosion-resistant construction reduces the chance of leaks and extends service life.
Fitment and Hose Routing
Correct fitment with factory mounting points, hose connections, and fan shroud alignment is crucial to a straightforward installation. The WRX has specific hose diameters, fitting locations, and mounting tabs; a radiator that matches these reduces installation time and minimizes the need for adapters.
Pay attention to inlet and outlet positions, petcock and sensor locations, and the proximity to the radiator support and condenser. A radiator that requires minimal modification will save time and prevent issues like stressed hoses or misaligned fans that could impair cooling performance.
Leak Resistance and Build Quality
Leak resistance comes from sound construction: quality brazing, reinforced end tanks, and robust seams. Radiators endure thermal cycling and vibration, so weld quality and reinforcement where hoses clamp matter for longevity. Look for evidence of consistent factory assembly processes and quality control.
Build quality also affects repairability. Radiators with serviceable mounting points, accessible drain petcocks, and standard sensor ports simplify maintenance and potential repair work. Choosing a radiator built to resist leaks helps avoid roadside failures and the additional labor of removal and replacement.
Compatibility With Performance Mods
Many WRX owners run intercoolers, thicker fans, or modified bumper openings that change airflow patterns and space available for the radiator. If you plan to keep or add performance modifications, verify clearance for larger cores and confirm the radiator will not interfere with intercooler piping or aftermarket fans.
Consider whether the radiator supports higher-pressure cooling systems or aftermarket fan shrouds. A radiator that accommodates your planned mods avoids repeated replacements and ensures cooling capacity scales with engine output.
Serviceability and Long-Term Maintenance
Maintenance considerations include ease of flushing, availability of replacement parts, and accessibility of drain points and sensor ports. A radiator that allows a full coolant drain and straightforward access to bleeder or sensor fittings reduces maintenance time and improves the reliability of coolant service.
Also consider warranty and support documentation. Clear installation guidance and accessible replacement parts or fittings make long-term ownership simpler, particularly for owners who prefer to perform service themselves.
Recognizing Common Radiator Symptoms
Radiator issues often begin with subtle signs before full failure. For the Impreza WRX, typical symptoms include higher-than-normal temperature readings during idling, visible coolant puddles under the vehicle after parking, or a sweet smell in the engine bay. Engine bay steam or persistent hot-stage temperature spikes under load indicate the cooling system is not keeping up.
- Increased operating temperature during traffic or hill climbs
- Coolant traces or crusty deposits around hose clamps and seams
- Visible steam or white smoke from the radiator area when under load
Preparing Your WRX for Radiator Replacement
Before replacing the radiator, gather the correct coolant specified for Subaru engines and the proper hose clamps and fittings. Park on level ground and let the engine cool completely to avoid scalding when opening the system. It helps to have the factory service manual or a reliable installation guide that maps out hose routing and mounting points for the WRX configuration.
- Wear gloves and eye protection when draining coolant
- Relieve any pressure by removing the radiator cap only when cold
- Label hoses and take reference photos to ensure correct reassembly
Radiator Coolant Flush Best Practices
A thorough coolant flush removes sediment and old coolant that can accelerate corrosion and clog small passages. For the WRX, use a compatible coolant and follow a two-stage flush if the system shows heavy contamination. After replacing the radiator, perform a complete flush and refill, then burp the system to eliminate air pockets that cause hot spots.
- Use the correct Subaru-compatible coolant mix ratio
- Run the engine with the heater on to cycle coolant through the heater core
- Check for leaks and re-torque hose clamps after the first heat cycle
Installation Tips to Ensure Proper Fitment
Careful handling during installation prevents damage to fins and tanks. Align mounting tabs and ensure the fan shroud mates correctly to avoid fan-to-radiator clearance issues. Replace worn hoses and clamps while the system is open to avoid repeating the job shortly after installation.
- Support the radiator while loosening mounting bolts to prevent stress on tabs
- Verify petcock and sensor positions match factory locations
- Test-fit the radiator with fans attached before finalizing mounting bolts
When to Consult a Professional
Minor radiator repairs like tightening clamps or replacing a leaking hose can be DIY, but signs like persistent overheating, recurrent coolant loss, or coolant mixing with oil warrant professional diagnosis. A technician can pressure-test the system, inspect for internal leaks, and confirm head gasket integrity if symptoms suggest more than a radiator fault.
- Persistent overheating after radiator replacement
- Coolant contamination in engine oil
- Repeated leaks at welded seams or tank junctions
Still looking for the perfect fit?
Select your Subaru Impreza configuration to see the most relevant Radiators recommendations
How We Chose the Best Subaru Impreza WRX Radiator
We focused on objective, vehicle-specific criteria to identify radiators suitable for the Subaru Impreza WRX. Primary evaluation factors included cooling capacity under typical and elevated load, physical fit and hose alignment with WRX-specific plumbing, and material choices that affect corrosion resistance and service life. We also weighed construction quality such as core thickness, tube count, and brazing or welded seam integrity because those determine leak resistance and heat transfer efficiency.Additional filters covered installation practicality, including mounting point consistency and whether factory brackets and shrouds remain usable. We excluded multi-vehicle universal cores that require significant custom trimming or modification, and we did not consider products advertised only for vague compatibility without clear WRX-specific fit details. The final list emphasizes radiators that balance durable cooling, direct fitment, and sensible installation requirements for the Impreza WRX.
Our full evaluation process is outlined in our review methodology.
FAQ
How do I know if my WRX radiator is leaking or if the leak is elsewhere?
Check for coolant pools under the front of the car and trace wetness to the source. Look for crusty coolant deposits around hose clamps, radiator seams, and the petcock. If you cannot find an external leak, a pressure test can reveal internal leaks or head gasket issues.
Can I swap a higher-capacity radiator into my WRX without modifying other components?
Sometimes a thicker or higher-capacity core fits without modification, but confirm clearance with the fan shroud, intercooler piping, and bumper support. Measure available space and check inlet/outlet alignment. When in doubt, choose a direct-fit option designed for the WRX to avoid unexpected trimming.
How often should I perform a radiator coolant flush on the Impreza WRX?
Flush intervals vary depending on coolant type and driving conditions, but a common recommendation is every 2 to 4 years. Inspect coolant condition visually; discolored or rusty fluid signals an earlier service. After any radiator replacement, perform a full flush to remove debris from the old core.
What are common causes of a radiator overheating under load?
Causes include reduced coolant flow from a clogged core, broken or slipping water pump, insufficient fan operation, or restricted airflow from damaged fins or blocked grille areas. Addressing routing, flow, and airflow components together helps resolve overheating under sustained load.
Is it worth upgrading to a full-metal radiator for long-term reliability?
Full-metal radiators often offer better resistance to thermal stress and reduced risk of tank failure compared with plastic-tanked units. The decision depends on your driving style and environment; owners who track their WRX or drive in corrosive conditions may find the extra durability worthwhile.
How do I avoid air pockets after installing a new radiator?
Follow a proper bleeding procedure: fill the system slowly with the engine cold, run the engine with the heater on low until the thermostat opens, and top up as air escapes. Tapping hoses gently and revving briefly during the initial warm-up can help dislodge trapped air. Recheck levels after the first few heat cycles.
Final Verdict
For the Subaru Impreza WRX, prioritize a radiator that balances proven cooling capacity with exact fitment and durable construction. Consider whether you need a thicker core or upgraded materials based on spirited driving or track use, but avoid units that require extensive modification to fit.Weigh the tradeoffs between peak cooling performance and installation simplicity, and focus on corrosion-resistant materials, proper hose alignment, and serviceability to minimize future downtime. Choosing with those priorities in mind will keep your WRX running cooler and more reliably under both daily and spirited conditions.
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