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If you own a 1993-2001 Subaru Impreza, the radiator is a critical component for daily drivability and long-term engine health. Age, corrosion, and impact damage commonly reduce cooling capacity and lead to overheating, coolant loss, or heater problems. Replacing the radiator restores proper engine temperature control and prevents more costly engine repairs.This guide covers the top shortlisted radiators compatible with the 1993-2001 Impreza and explains the evaluation criteria used to pick them. You will find guidance on fitment, construction, cooling capacity, and installation considerations to help you choose the right replacement for your driving habits and maintenance budget.
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 | Readair Replacement Radiator for Subaru Forester / Impreza (Direct Fit) | ![]() |
| Best Quality Built to a higher standard if you want something more solid | Mishimoto Performance Aluminum Radiator for Subaru Impreza GC8 (1993–1998) | ![]() |
| Best Value The sweet spot between price and what you get | BDFHYK Aluminum Radiator for Subaru Impreza (1999–2001) CU2402 | ![]() |
| Best Budget The cheapest option that still gets the job done reliably | Agility Auto Parts Radiator (Radiator 8011574) | ![]() |
| Highest Rated A top-rated pick with lots of positive feedback | Lynol Complete Aluminum Radiator, Direct Replacement for 1999–2001 Subaru Impreza / 1999–2002 Forester | ![]() |
| Most Popular A crowd favorite that many people choose with confidence | Readair Engine Coolant Radiator with Transmission Oil Cooler for Subaru Forester/Impreza 2.5L (1999–2002 Forester, 1998–2001 Impreza) | ![]() |
| Best Seller A high-volume bestseller chosen again and again | TYC 2402 Replacement Radiator for Subaru Impreza (1999–2002) | ![]() |
1. Readair Replacement Radiator for Subaru Forester / Impreza (Direct Fit)
| Flow Type | Downflow |
|---|---|
| Transmission Oil Cooler | Included |
| Core Height | 27.04 inch |
| Core Width | 13.39 inch |
| Core Thickness | 0.63 inch |
This Readair radiator is a direct-fit aluminum replacement designed to match factory mounting points and hose connections on specified Subaru Forester and Impreza automatic-transmission models. It installs as a drop-in unit for owners or shops and includes an integrated transmission oil cooler, making it suitable when replacing a leaking or clogged radiator on cars with automatic transmissions. The downflow core and full-aluminum construction aim to improve heat dissipation and resist corrosion compared with older stock units. Practical benefits include compatibility with multiple OEM part numbers, pressure and leak testing to factory-quality standards, and no need for cutting or extra parts during installation. Important limitations are that instructions are not included and the listing targets automatic-transmission models only, so manual-transmission cars are not covered; professional installation is recommended if you are not comfortable working on cooling systems.
Best for: Buyers who want a reliable, factory-quality replacement radiator for their 1999–2002 Forester or 1999–2001 Impreza automatic and prefer a drop-in part that restores cooling and includes a transmission cooler.
Less Ideal for: Owners of manual-transmission cars or anyone needing a radiator with included installation guidance and hardware should consider other options or professional installation.
- Direct 1:1 drop-in fitment for the listed Subaru Forester and Impreza automatic models
- All-aluminum downflow core for improved heat dissipation and corrosion resistance
- Includes transmission oil cooler integrated into the radiator
- Manufacture and testing claim pressure and leak checks to meet factory-quality standards
- Instructions are not included, which may complicate DIY installation for less experienced users
Verdict: Choose this radiator when you need a direct-fit, all-aluminum replacement that restores cooling and adds an integrated transmission cooler for your specified Subaru automatic model.
2. Mishimoto Performance Aluminum Radiator for Subaru Impreza GC8 (1993–1998)
| Fitment | 1993–1998 Subaru Impreza GC8 |
|---|---|
| Core Type | Brazed aluminum core |
| End Tanks | TIG-welded aluminum |
| Drain Plug | Magnetic drain plug |
| Includes | High-pressure radiator cap |
This Mishimoto aluminum radiator replaces the factory unit on 1993–1998 Subaru Impreza GC8 models with a drop-in, performance-focused design. It uses a brazed aluminum core and TIG-welded end tanks to increase strength and reduce distortion under heat, while the included high-pressure radiator cap raises coolant boiling point for better thermal margin. A magnetic drain plug helps capture metallic debris and the radiator ships with a serial plate for authenticity. In everyday use it reduces operating temperatures compared with stock radiators, which is useful for spirited driving, towing, or cars with minor engine modifications. Installation is intended to be direct-fit so most owners can swap it with standard tools without modifying mounts or hoses. Expect a firmer, longer-lasting assembly versus plastic-tank replacements, though this unit is an aftermarket performance part rather than an OEM original. Buyers should check cooling fan and shroud clearance during installation because vehicle-specific components still matter for a trouble-free fit.
Best for: A performance-focused Impreza owner wanting a reliable, longer-lasting cooling upgrade that lowers running temperatures during spirited driving or mild engine modifications.
Less Ideal for: Drivers seeking an exact factory replacement with original plastic tanks or those who need a universal-fit radiator for multiple vehicles should look elsewhere.
- Direct-fit design intended for simple installation into the 1993–1998 Impreza GC8
- Brazed aluminum core and TIG-welded end tanks for improved durability and heat transfer
- Includes high-pressure radiator cap to raise coolant boiling point for better cooling performance
- Magnetic drain plug helps catch metal particles and protect the cooling system
- Designed specifically for the GC8 Impreza 1993–1998 so it is not a universal replacement
Verdict: If you want a direct-fit cooling upgrade that reduces engine temps and adds durable all-aluminum construction for 1993–1998 Impreza GC8 performance use, this Mishimoto radiator is a strong choice.
3. BDFHYK Aluminum Radiator for Subaru Impreza (1999–2001) CU2402
| Model | CU2402 |
|---|---|
| Manufacturer | BDFHYK |
| Core | 1-row 16 mm |
| Exterior | Polished |
| Replaces | 2402 / CU2402 / DPI2402 |
This BDFHYK radiator is a direct-fit replacement for Subaru Impreza 1999–2001 that swaps in without modification and restores the cooling system to factory-style operation. It uses a 1-row, 16 mm aluminum core with tube-and-fin construction and brazed joints to improve heat transfer and resist corrosion; the listing also notes a brass petcock drain and a CNC-machined cap for more durable service than plastic parts. Typical use is straightforward: remove the old unit and install this radiator to reestablish consistent coolant circulation and stable engine temperatures during daily driving. Benefits include improved thermal dissipation versus older, corroded cores and a factory-style fit that simplifies installation. Limitations are that the single-row core is tuned for normal driving and may not deliver the extra cooling margin required for heavy towing, high-performance tuning, or track use, and buyers should verify hose and bracket alignment before installing. Overall this is a practical, direct-replacement option for restoring cooling reliability on affected Impreza models.
Best for: Buyers who want a reliable, factory-style replacement to restore cooling performance on a 1999–2001 Impreza without fuss and who prioritize straightforward fitment and durability.
Less Ideal for: Drivers planning engine upgrades, track driving, or heavy-duty use who need higher-capacity or multi-row radiators should consider performance-oriented alternatives.
- Direct-fit design for 1999–2001 Subaru Impreza that reduces installation time and modifications
- Aluminum tube-and-fin core with brazed construction improves heat dissipation and corrosion resistance
- OEM-style brass petcock drain and CNC-machined cap for greater durability than common plastic fittings
- Single-row 16 mm core is optimized for regular driving and may not provide sufficient cooling for heavy-duty or high-performance demands
Verdict: A no-nonsense, factory-style aluminum replacement that restores reliable cooling to 1999–2001 Subaru Impreza with easy direct fitment.
4. Agility Auto Parts Radiator (Radiator 8011574)
| Manufacturer Part Number | 8011574 |
|---|---|
| OEM Part Number | 45199FA030, 45199FA040, 45199FC021, 45199FC031 |
| Core Description | 1 Row downflow core |
| Transmission Cooler | With transmission oil cooler |
This Agility Auto Parts radiator is a straightforward factory-replacement style cooling unit for 1993–1998 Subaru Impreza models. It uses a one-row downflow core with a built-in transmission oil cooler and no engine oil cooler, matching the factory-style layout so installation follows stock mounting points and hose locations. Typical use is direct swap-in for a leaking or damaged radiator; the machined exterior and core dimensions aim to restore cooling capacity and maintain normal operating temperatures. Benefits include a compact, single-row core that fits under tight shrouds and the included transmission cooler passage for automatics. Expect an affordable aftermarket option that gets the car back on the road with standard cooling performance. Limitations are the single-row core construction, which may not dissipate heat as effectively as multi-row or performance radiators under heavy towing, high-performance driving, or extremely hot climates, and this unit does not include an engine oil cooler provision.
Best for: Drivers who need an affordable, direct replacement radiator to restore factory cooling on a 1993–1998 Subaru Impreza and prioritize cost and fitment over performance upgrades.
Less Ideal for: Owners looking for upgraded cooling for track use, heavy-duty towing, or driving in extreme heat should consider multi-row or performance radiators instead.
- Direct-fit replacement that follows factory mounting and hose locations
- Includes transmission oil cooler passages for automatic transmissions
- Compact single-row core fits where space is limited
- Machined exterior finish for a tidy appearance
- Single-row core offers more limited cooling capacity compared with multi-row or performance radiators
- Does not include provision for an engine oil cooler
Verdict: A budget-friendly, direct-fit replacement that restores factory cooling and includes a transmission cooler for 1993–1998 Subaru Impreza owners seeking reliable, low-cost repairs.
5. Lynol Complete Aluminum Radiator, Direct Replacement for 1999–2001 Subaru Impreza / 1999–2002 Forester
| Manufacturer Part Number | LR2402 |
|---|---|
| ABPA Partslink Number | SU3010105 |
| Inlet Size | 1 1/2" |
| Outlet Size | 1 1/2" |
| Row | 1 |
This Lynol complete aluminum radiator is a one-piece direct replacement for late 1990s to early 2000s Subaru Impreza and Forester models, built to restore factory cooling performance without modification. It is typically used when an original radiator is leaking, corroded, or no longer cooling efficiently; installation follows the factory mounting points and hose connections so a routine shop or experienced DIY install will suffice. Notable features include full aluminum construction, individual leak testing, and an accelerated cycling test during production to improve durability. In practice the radiator provides consistent cooling under normal driving and towing conditions, and the 1 1/2" inlet and outlet simplify hose routing. Limitations are that fitment is specific to the listed model years and engine configurations and that it is a single-core-style replacement which prioritizes fit and reliability over potential high-performance cooling upgrades. The unit comes with a one-year warranty covering defects and a stated parts reference to help confirm compatibility.
Best for: Buyers who prioritize dependable, factory-like cooling and want a straightforward replacement that restores original performance with minimal fuss.
Less Ideal for: People seeking an upgraded high-capacity or performance radiator for heavy track use or substantial power increases should consider performance-oriented options instead.
- Direct bolt-in design replaces factory radiator without modifications
- Full aluminum construction with individual leak testing for durability
- Manufacturing cycle testing aimed at consistent cooling performance
- Supplied inlet and outlet sizes match standard hose hookups for straightforward installation
- Single-row thickness may not provide extra cooling headroom for high-performance use
Verdict: Choose this radiator when you want a reliable, bolt-in factory-quality replacement to restore proper cooling on compatible Subaru Impreza and Forester models.
6. Readair Engine Coolant Radiator with Transmission Oil Cooler for Subaru Forester/Impreza 2.5L (1999–2002 Forester, 1998–2001 Impreza)
| Transmission Oil Cooler Included | YES |
|---|---|
| Core Height | 13-2/5 inch |
| Core Width | 27-1/10 inch |
| Core Thickness | 3/5 inch |
| Inlet/Outlet Diameter | 1-1/2 inch |
This Readair radiator is a direct-fit replacement for late 1990s to early 2000s Subaru Forester and Impreza 2.5L applications and includes a built-in transmission oil cooler for complete cooling system service. It uses an aluminum core with TIG-welded end tanks and PA66 GF30 inlet/outlet tanks, and the unit is pressure-tested for leaks and treated with a protective coating. Installation is typical for a radiator swap: drain fluids, remove mounts and hoses, and refit with existing brackets and lines; the integrated cooler simplifies reconnection for compatible automatic transmissions. The practical benefits are straightforward: improved heat dissipation from the aluminum core, factory-style fitment that reduces modification, and the included transmission cooler avoids a separate aftermarket add-on. Limitations to note are that fitment is limited to the specific Subaru model years listed and the product description lists core dimensions and hose diameters that should be checked against your vehicle before purchase; professional installation is recommended if you are not experienced with cooling systems.
Best for: Buyers who prioritize a reliable, factory-style replacement with an integrated transmission cooler and prefer products with documented construction and customer feedback to reduce installation risk.
Less Ideal for: Do not choose this if you need a universal radiator, a different engine displacement, or if you plan significant engine or cooling-system modifications that change hose positions or connections.
- Direct-fit replacement designed for specified 1998–2002 Forester and Impreza 2.5L models, reducing the need for modifications
- Aluminum core with TIG-welded construction and treated coating for better heat transfer and corrosion resistance
- Integrated transmission oil cooler eliminates the need to source a separate cooler for compatible automatics
- Leak-tested assembly and high-grade plastic tanks aimed at durability
- Includes reference OEM part numbers for easier fit confirmation
- Compatibility strictly limited to the listed model years and engine configurations, so verification is required before buying
Verdict: A ready-to-install, leak-tested aluminum radiator with an integrated transmission cooler made for specified 1998–2002 Subaru Forester and Impreza 2.5L models, ideal for buyers wanting a dependable factory-style replacement backed by reviews.
7. TYC 2402 Replacement Radiator for Subaru Impreza (1999–2002)
| Manufacturer | TYC |
|---|---|
| Model | TYC 2402 Replacement Radiator for SUBARU |
| Position | Front, Rear |
| OEM Part Number | 45199FC340 |
The TYC 2402 is a direct replacement radiator meant to restore factory cooling for Subaru Impreza vehicles from the late 1990s and early 2000s. It uses premium-grade aluminum tubes and folded, louvered aluminum fins to reproduce coolant flow and heat transfer similar to the factory unit, and TYC states each radiator is leak-tested before shipping. Design reinforcements such as aluminum inlet rings, internal tank ribs, expansion grooves, and double header plates improve long-term durability and help prevent leaks. Installation is intended as a drop-in, which simplifies swapping the old core for the new one without significant modification. The unit is suitable for applications where you want a like-for-like replacement and dependable day-to-day cooling; however it does not advertise performance upgrades over the factory part and buyers should confirm fitment for specific model years and transmission cooler needs prior to purchase.
Best for: Buyers who prioritize a reliable, factory-equivalent cooling replacement for routine driving and want minimal installation hassle and risk.
Less Ideal for: Drivers seeking a high-performance or race-oriented cooling upgrade or those who need a multi-vehicle or custom-fit solution.
- Direct OEM-style replacement aiming for factory coolant flow and fin/tube layout
- Premium aluminum tubes and folded/louvered fins for effective heat transfer
- Leak-tested at the factory to reduce risk of out-of-box failures
- Design reinforcements (inlet rings, ribs, expansion grooves, double header plates) for improved durability
- No advertised performance improvements over the factory radiator
Verdict: Choose this TYC radiator if you want a factory-style, leak-tested replacement that restores original cooling performance with straightforward drop-in installation.
Choosing the Right 1993-2001 Subaru Impreza Radiator: Key Factors to Consider
Fitment And Mounting Compatibility
Correct fitment is critical because the 1993-2001 Subaru Impreza has limited clearance and specific mounting points. A radiator that lines up with the factory brackets, drain petcock, and fan shroud reduces installation time and prevents stress on hoses and fittings.
Improperly aligned units often require custom brackets or trimmed shrouds, which increases labor and introduces vibration or leak risks. Check inlet and outlet locations, transmission cooler ports if your model has an automatic transmission, and the radiator top and bottom mounting pad positions when assessing compatibility.
Core Design And Cooling Capacity
Core design determines how efficiently the radiator moves heat away from engine coolant. Thicker cores or multi-row designs typically offer greater heat rejection, which matters if you tow, drive aggressively, or live in hot climates.
However, increased core thickness may affect fan clearance and airflow through the shroud. For the Impreza, balance core size with available fan space and ensure the cooling fan can still pull adequate air through the core when the vehicle is stationary.
Material Quality And Corrosion Resistance
Radiators are commonly constructed from aluminum cores with plastic or aluminum end tanks. Aluminum cores with quality brazed seams and corrosion-resistant coatings extend service life compared with poorly finished units.
Plastic tanks can be susceptible to thermal cycling damage over many years. When replacing an older radiator, consider materials that resist electrolysis and coolant-related corrosion. Use compatible coolant chemistry and consider replacement hoses or clamps if they show age-related wear.
Seal And Joint Durability
Leaks most often occur at joints, end tanks, or where fittings attach. Radiators with reinforced crimps, welded or brazed joints, and quality gaskets reduce the likelihood of early leakage.
Evaluate the manufacturing method for the tank-to-core connection and the reputation for long-term sealing. For the Impreza, a durable seal is important because road salt and debris exposure can accelerate joint degradation in older vehicles.
Hose And Transmission Cooler Compatibility
Hose diameters and transmission cooler ports must match the existing lines on your Impreza. A radiator that requires adapters or resizing introduces additional failure points and complicates installation.
If your vehicle has an automatic transmission, confirm whether the replacement integrates a transmission cooler and that its fittings line up with factory routing. For manual-transmission cars, verify there are no unnecessary ports that could cause confusion during installation.
Ease Of Installation And Serviceability
Ease of installation influences labor time and whether you can complete the job at home. Radiators that retain stock mounting features, standard drain petcocks, and accessible bleed points simplify replacement.
Consider how the radiator interacts with surrounding components such as the A/C condenser, fan assembly, and upper radiator support. Units that require removal of fewer ancillary parts or that provide clear instructions reduce installation errors and the chance of damaging nearby components.
Signs Your Impreza Radiator Needs Replacement
Several practical symptoms indicate a radiator issue on a 1993-2001 Impreza. Frequent overheating, visible coolant leaks beneath the car, a sweet smell in the engine bay, or low coolant levels with no visible external leak all suggest the cooling system should be inspected.
Other clues include discolored or milky coolant, which can indicate internal contamination, and reduced heater output at idle, which often results from poor coolant flow through the heater core linked to radiator or flow problems. Addressing these signs early prevents head gasket or engine damage.
- Intermittent or sustained overheating on highway or in traffic
- Coolant puddles or drip stains under the front of the car
- Sweet or syrupy odor in the engine bay
- Low coolant levels requiring frequent top-offs
- Reduced cabin heat at idle
Preparing Your Vehicle For Radiator Replacement
Before starting a radiator replacement on an Impreza, let the engine cool completely, and relieve system pressure by opening the radiator cap only when cold. Gather the required tools: drain pan, pliers for hose clamps, screwdrivers, a set of sockets, and a funnel for refilling coolant.
Label hoses and take photos of routing to ensure correct reconnection. Inspect the surrounding components such as the fan shroud, upper support, and A/C condenser for damage. Replace worn clamps and consider new hoses if the originals are softened or cracked.
- Park on a flat surface and set the parking brake
- Cool engine to ambient temperature before draining
- Disconnect the negative battery terminal if working near electrical components
- Use a new clamp and inspect hose ends for wear
Coolant And Flushing Considerations For Older Imprezas
When installing a new radiator, flush the cooling system to remove rust, scale, and residual deposits. A clean system helps the new radiator perform optimally and prevents premature clogging. Use the correct coolant type specified for Subaru engines of this era and follow recommended mixture ratios.
After installation, bleed trapped air from the system by running the engine to operating temperature with the radiator cap off or following the vehicle specific bleed procedure. Monitor coolant level and for any signs of leaks over the first few heat cycles.
- Perform a coolant flush to remove contaminants
- Use the manufacturer-recommended coolant type and concentration
- Bleed air carefully after refill to avoid hot spots
- Check for leaks after a short test drive
When To Repair Versus Replace A Radiator
Minor localized leaks from a small pinhole or a damaged hose connection may be repairable with a patch, epoxy, or by replacing a hose or clamp. However, widespread corrosion, multiple seam leaks, or cracked end tanks indicate the unit is near end of life and replacement is the more reliable option.
Consider the vehicle age and the remaining useful life of other cooling system components. For a 1993-2001 Impreza, replacing an old radiator with a correctly matched unit often reduces the chance of repeated service and provides more reliable cooling than patch repairs on aged cores.
- Repair is reasonable for small, isolated leaks
- Replace when corrosion, multiple leaks, or cracked tanks are present
- Replace to restore factory cooling capacity if the core is clogged
- Factor labor and potential recurrence when deciding
Tools And Parts To Have On Hand
Collect the necessary components before starting the job. In addition to the replacement radiator, gather new hose clamps, a radiator cap if required, coolant, and any gaskets or mounting hardware specified for the Impreza. A torque wrench or properly sized sockets will help ensure correct fastener torque for mountain of parts that may be reinstalled.
If your vehicle uses an automatic transmission, ensure you have the correct fittings or lines for the transmission cooler if they need replacement. Also keep rags, a proper drain pan, and a funnel handy to minimize spills and make refilling cleaner.
- New hose clamps and a replacement radiator cap if needed
- Manufacturer-recommended coolant and a funnel
- Drain pan and absorbent pads to capture coolant
- Basic hand tools and socket set for removal and installation
Still looking for the perfect fit?
Select your Subaru Impreza configuration to see the most relevant Radiators recommendations
How We Chose the Best 1993-2001 Subaru Impreza Radiator
We focused on criteria that matter specifically for replacing radiators on 1993-2001 Subaru Impreza models. Primary evaluation factors included fitment accuracy, core construction and cooling efficiency, corrosion resistance and material quality, outlet/inlet location and hose compatibility, and compatibility with stock mounting points and shrouds. We also considered manufacturing tolerances that affect leak resistance and the availability of correct transmission cooler integration where applicable.Each candidate had to demonstrate correct physical dimensions and hose spacing for the Impreza range, an appropriate core design to restore cooling capacity for the engine sizes in these years, and durable end tanks and seams to minimize early leakage. Units that required extensive bracket modification or custom hose adapters were excluded. We also excluded radiators that lacked clear specifications for core thickness, fin density, or inlet/outlet dimensions. Our process prioritized options that balance longevity, ease of installation, and effective heat rejection for this specific vehicle scope.
Our full evaluation process is outlined in our review methodology.
FAQ
How do I know if the radiator or a hose is causing coolant loss?
Inspect the entire cooling system visually for wet spots, stains, or drips after a short drive. Hoses usually show external seepage at joints or cracks, while radiator leaks often originate from the seams, core, or tanks. Pressure testing the system isolates slow leaks and pinpoints the source.
Can I use universal radiators or do I need an Impreza-specific unit?
Universal cores exist but often require extra brackets, custom hose adapters, or trimming to fit. For a 1993-2001 Impreza, an application-specific radiator that matches inlet/outlet locations and mounting points reduces installation time and minimizes the risk of misalignment or leaks.
How often should I flush the cooling system after installing a new radiator?
After installing a new radiator, flushing once to remove debris prior to installation is recommended. Thereafter, follow routine maintenance intervals, typically every two to five years depending on coolant type and driving conditions, or sooner if you observe contamination or overheating.
Are aluminum radiators better than ones with plastic tanks for this Impreza?
Aluminum cores with aluminum tanks generally offer better long-term durability and resistance to thermal cycling, while plastic tanks are lighter and less expensive. For older Impreza models, aluminum assemblies can reduce the chance of tank cracking, but ensure the unit fits correctly and uses compatible mounting hardware.
Will upgrading to a thicker core cause fitment problems?
A thicker core can improve cooling but may reduce fan clearance and airflow through the shroud. Verify available space behind the shroud and ensure the fan can engage fully. If clearance is insufficient, a thicker core could cause installation difficulty or reduced fan efficiency.
What should I do if I find corrosion inside the cooling system?
If internal corrosion is present, perform a thorough system flush and consider replacing corroded hoses and the thermostat. Persistent corrosion may indicate electrolysis or incompatible coolant chemistry. Address the root cause and install a clean radiator to avoid recontamination.
Final Verdict
When replacing a radiator on a 1993-2001 Subaru Impreza, prioritize correct fitment, durable construction, and core design that restores the engine's cooling capacity. Balance the desire for greater heat rejection with the physical constraints of the engine bay and fan clearance.Choose a radiator that aligns with the Impreza's hose locations and mounting points, uses quality joints and materials to minimize leaks, and supports straightforward installation and future servicing. Focusing on those tradeoffs will give you the most reliable outcome for everyday driving and long-term engine protection.
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