1. Engine Cooling Components Deals
  2. sku: 20805938362591731
  3. AAPF 675-50361

AAPF 675-50361 Radiator 12/31/08

fits model: Turbo, Sti, Impreza. year: 2008–2009.

675-50361 Aapf Radiator With Turbo Sti Thru 12/31/08 Fits 08-09 Impreza 1067534

( Brand: Aapf ), ( Part Type: Radiator ), ( Genuine Oem: No ), ( Ipn: 675-50361 )

Review AAPF Radiator Thru 12/31/08 fits IMPREZA TURBO STI 2008–2009

The **AAPF 675-50361 Radiator** is a meticulously engineered, high-performance cooling solution specifically designed for the iconic **2008-2009 Subaru Impreza WRX STI (12/31/08 model)**, including the legendary **2.5L EJ257 turbocharged engine** found in this generation. Crafted to meet the demanding thermal loads of high-output turbocharged applications, this radiator is built with **high-quality, corrosion-resistant materials** to ensure durability and longevity, even under extreme driving conditions. The core features a **titanium or aluminum honeycomb design** (depending on the exact variant), optimized for maximum heat dissipation while maintaining structural integrity, allowing for superior airflow efficiency and reduced pressure drop compared to standard OEM units. Its **customized tube-and-fin configuration** is tailored to handle the elevated cooling demands of the STI s aggressive turbocharged setup, preventing overheating during spirited driving, track sessions, or prolonged high-load operation. The radiator is equipped with **reinforced mounting brackets and grommets**, ensuring a secure and leak-free fitment with minimal vibration transfer, which is critical for maintaining performance and reliability over time. Additionally, the **high-flow inlet and outlet connections** are designed to minimize turbulence, further enhancing cooling efficiency while reducing the risk of coolant aeration. Whether you're pushing the limits on the street, preparing for a dyno session, or simply seeking a more robust upgrade over the stock unit, this radiator delivers **superior thermal management** without compromising on fitment or performance. Built to exacting standards, it s an essential component for any STI owner looking to optimize cooling performance, extend engine life, and maintain peak efficiency in demanding driving scenarios.

### **Pros and Cons of buying a AAPF 675-50361 Radiator (Turbo STI, 2008-2009 Impreza)**

#### **Pros:**

1. **Direct Fitment** This radiator is specifically designed for the **2008-2009 Subaru Impreza WRX STI (turbocharged)**, ensuring compatibility without modifications.

2. **High-Quality Construction** AAPF (All American Performance Products) is a reputable brand known for durable, well-engineered radiators that can handle the demands of a turbocharged engine.

3. **Improved Cooling Efficiency** The radiator is likely larger or better designed than the OEM unit, potentially offering better heat dissipation, which is critical for a turbocharged engine that runs hotter.

4. **Compatibility with Upgrades** If you plan to modify your STI (e.g., bigger turbo, upgraded intercooler, or increased power), this radiator may provide a better foundation for handling increased heat loads.

5. **Warranty & Support** AAPF products often come with warranties, and the brand has a good reputation for customer service, which can be reassuring for a critical component like a radiator.

6. **Prevents Overheating** A well-functioning radiator is essential for preventing catastrophic engine damage, especially in a turbocharged setup where heat management is critical.

7. **Easier Installation** Since it s a direct replacement, installation should be straightforward compared to aftermarket radiators that may require additional hoses or brackets.

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#### **Cons:**

1. **Cost** Aftermarket radiators like this one are typically more expensive than OEM replacements, which may be a significant upfront investment.

2. **Potential Overkill for Stock Applications** If your STI is running stock power levels (around 270-300 hp), an upgraded radiator may not be strictly necessary unless you ve had overheating issues or plan to modify further.

3. **Maintenance Requirements** Like any radiator, this one will require periodic flushing, coolant changes, and inspections for leaks or corrosion, especially in a high-performance setup.

4. **Compatibility with Other Upgrades** If you ve already installed other aftermarket cooling components (e.g., a larger intercooler, upgraded water pump, or custom hoses), you may need to ensure everything integrates properly.

5. **Risk of Installation Errors** If not installed correctly (e.g., improper sealing, air pockets, or incorrect coolant mix), it could lead to overheating or failure.

6. **Durability Concerns Over Time** While AAPF is reliable, no radiator lasts forever. In a high-mileage or heavily modified STI, it may eventually need replacement again.

7. **Potential for Counterfeit Products** If purchasing from a third-party seller, there s a risk of receiving a fake or low-quality replica. Always buy from authorized dealers or trusted vendors.

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### **Ending Conclusion:**

The **AAPF 675-50361 radiator** is a solid choice for a **2008-2009 Subaru Impreza WRX STI**, especially if you re concerned about overheating, planning modifications, or have experienced cooling issues with the OEM unit. It offers improved durability and efficiency compared to stock, but it s not strictly necessary for stock applications. The decision ultimately depends on your budget, long-term goals for the car, and whether you ve had past cooling-related problems.

If you re running stock power or have no overheating issues, you might consider waiting to see how the OEM radiator holds up before investing in an upgrade. However, if you re pushing the engine harder (e.g., with a bigger turbo, forced induction, or high-performance tuning), this radiator is a wise precaution.

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### **Recommendation:** - **Buy it if:**

- You ve had overheating issues with the OEM radiator.

- You re planning turbo upgrades, forced induction, or significant power increases.

- You want a long-term, high-quality replacement that exceeds OEM standards.

- You re comfortable with the higher cost and maintenance requirements.

- **Avoid it if:**

- Your STI is running stock power with no cooling problems.

- You re on a tight budget and can t justify the expense without clear benefits.

- You re unsure about proper installation or maintenance (cooling system issues can be serious).

**Final Verdict:** For a **turbo STI with performance aspirations**, this radiator is a **strong upgrade worth considering**. For a **stock or lightly modified STI with no cooling issues**, it may not be immediately necessary, but it s a reliable long-term solution if problems arise. Always pair it with proper coolant (50/50 mix, preferably synthetic), regular maintenance, and a well-functioning cooling system.

Details:

IMPREZA 08 2.5L, MT, w/turbo, STi. Fits 08-14 Subaru WRX, 2.5L Engine. IMPREZA 09 2.5L, MT, w/turbo, STi, thru 12/31/08.

specifications ocoosys:

  • for models: Turbo, Sti, Impreza
  • for years: 2008-2009
  • brand: Aapf
  • part type: Radiator
  • genuine oem: No
  • ipn: 675-50361

shipping ocoosys:

  • service: Expedited
  • transit: 4-8 Days
  • class: Expedited
  • type: Fixed
  • cost: $0.00

seller ocoosys:

  • rating: 100.0%
  • # reviews: 3115
  • city: Kingston Springs, Tennessee

general ocoosys:

  • Car Truck Parts Accessories > Engine Cooling Components > Radiators
  • condition: New

payments ocoosys:

  • wallet: Apple-pay
  • other
  • credit card: Visa

offer ocoosys:

  • quantity: 1
  • availability: In Stock
  • started: April 3, 2026
  • options: Ship-to-home
  • sold: 0

returns ocoosys:

  • policy: Returns Accepted
  • paid by: Seller
  • time: 30 Days
for models: turbo, sti, impreza, for years: 2008-2009, part type: radiator, genuine oem: no,
category: auto parts > car truck parts accessories > engine cooling components > radiators, sku: 20805938362591731,
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