SUBARU GENUINE 10103-AB450 Engine Dohc 2.5L

( Brand: Subaru Genuine ), ( Manufacturer Part Number: 10103-AB450 ), ( Fuel Type: Petrol ), ( Type: Engine Long Block ), ( Core Charge: Not Required ), ( Manufacturer Warranty: Yes ), ( Oe/oem Part Number: 10103-ab450, 10103ab450, 10103-ab440, 10103ab440, 10100-bk200, 10100bk200 ), ( Number Of Valves: 16 ), ( Engine Size: 2.5 L ), ( Block Type: Boxer ), ( Country Of Origin: Japan )

Review SUBARU GENUINE Engine Dohc For And 2.5l fits IMPREZA FORESTER LEGACY EJ25 EJ255 B25 TURBO 2002–2009

Introducing the Subaru EJ25 series engine, specifically model number 10103-AB450, designed for Subaru Impreza and Forester vehicles manufactured between 2002 and 2009 with a 2.5L engine. This DOHC (Double Overhead Camshaft) engine is renowned for its exceptional balance between power and efficiency.

The EJ25 engine is a horizontally opposed, or "boxer," design, which offers several advantages, including a lower center of gravity for improved handling and stability. This engine features a turbocharger, allowing it to deliver impressive power output with remarkable responsiveness. The turbocharger is fed by an intercooler, ensuring optimal air intake for maximum engine performance.

The EJ25 engine's combustion chamber design incorporates a unique and efficient direct fuel injection system. This system ensures precise fuel delivery, minimizing fuel waste and optimizing power output. Additionally, the engine's intake and exhaust systems are designed to work together efficiently, reducing engine heat and improving overall performance.

This engine is equipped with a cast-iron block and aluminum cylinder head, which provides excellent durability and weight savings. The engine also features a dual-mass flywheel, which reduces engine vibrations for a smoother and more refined driving experience.

The EJ25 engine is known for its reliability and longevity, making it a popular choice among Subaru enthusiasts. Its advanced engineering and robust design make it an ideal choice for those seeking power, efficiency, and dependability in their Subaru Impreza or Forester.

In summary, the Subaru EJ25 engine, model number 10103-AB450, is a high-performing and durable powertrain option for Subaru Impreza and Forester vehicles manufactured between 2002 and 2009 with a 2.5L engine. Its turbocharged design, direct fuel injection system, and advanced engineering features make it a reliable and efficient powertrain choice for those seeking power, efficiency, and excellent driving dynamics.

The Subaru EJ25/EJ255 turbo engines, specifically the ones labeled as 10103-AB450 for the Impreza and Forester models produced between 2002 and 2009 with a 2.5L 4-cylinder DOHC configuration, have gained popularity among enthusiasts for their performance potential. However, as with any engine upgrade, there are pros and cons to consider before making a purchase.

1. Power: The EJ25/EJ255 turbo engines offer significant power gains compared to the stock non-turbo engines. This results in improved acceleration and overall performance.

2. Reliability: Subaru engines have a reputation for durability and reliability, which is expected to carry over to the turbocharged variants.

3. Wide availability: These engines are widely available on the second-hand market, making them a relatively affordable option for those looking to upgrade their vehicles.

4. Tuning potential: The EJ25/EJ255 engines can be easily tuned to extract even more power, making them a popular choice among enthusiasts.

1. Complexity: Turbocharged engines are more complex than their naturally aspirated counterparts. This means more components that can potentially fail and require maintenance.

2. Cost: While the engines themselves are relatively affordable, the cost of maintenance, tuning, and potential repairs can add up quickly.

3. Fuel economy: Turbocharged engines generally consume more fuel than their non-turbo counterparts. This can lead to higher operating costs over time.

4. Emissions: The increased power output of the turbocharged engines may result in higher emissions, which could be a concern for those living in areas with strict emissions regulations.

The Subaru EJ25/EJ255 turbo engines offer significant power gains and the reliability Subaru is known for. However, they also come with increased complexity, maintenance costs, and potential fuel economy concerns. Ultimately, the decision to purchase one of these engines depends on your individual priorities, budget, and driving habits. If you prioritize power and performance, and are willing to accept the additional costs and complexity, then this engine may be the right choice for you. Alternatively, if you prioritize fuel economy or ease of maintenance, you may want to consider other options.

Before making a decision, it is recommended that you thoroughly research the market to understand the availability, pricing, and potential issues with these engines. Additionally, consider consulting with a reputable mechanic or tuning specialist to discuss your specific use case and to help you weigh the pros and cons of this engine upgrade. Ultimately, the decision should be based on your individual priorities and circumstances.

Details:

part #: 10103ab450 prices

• $1219.00-$6000.00

specifications grokengines:

• for models: Ej25, Ej255, B25, Turbo, Impreza, Forester, Legacy
• for makes: Subaru
• for years: 2002-2009
• brand: Subaru Genuine
• mpn: 10103-ab450
• fuel type: Petrol
• type: Engine Long Block
• core charge: Not Required
• manufacturer warranty: Yes
• oe/oem part number: 10103-ab450, 10103ab450, 10103-ab440, 10103ab440, 10100-bk200, 10100bk200
• number of valves: 16
• engine size: 2.5 L
• block type: Boxer
• country of origin: Japan

shipping grokengines:

• type: Calculated
• carrier: USPS
• cost: $47.48
• transit: 5-11 Days
• class: Standard
• service: USPS Ground Advantage

payments grokengines:

• other
• credit card: Mastercard
• wallet: Google-pay

general grokengines:

• condition: New other see details
• Car Truck Parts Accessories > Engines Engine Parts > Engines

offer grokengines:

• sold: 0
• quantity: 1
• options: Ship-to-home
• availability: In Stock
• started: April 5, 2026

returns grokengines:

• policy: No Returns

seller grokengines:

• rating: 100.0%
• # reviews: 6
• city: Ketchikan, Alaska

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