IAG PERFORMANCE IAG-ENG-L550N Block Engine EJ257 2.5L For 550bhp

( Brand: Iag Performance ), ( Manufacturer Part Number: IAG-ENG-L550N ), ( Type: Engine Long Block ), ( Engine Size: 2.5 L ), ( Block Type: Flat ), ( Number Of Valves: 16 ), ( Country/region Of Manufacture: United States ), ( Fuel Type: Gasoline )

Review IAG PERFORMANCE 2.5l Built Long Block Engine For 550bhp fits STI 550 2008–2021

The IAG Performance IAG-ENG-L550N is a high-performance 2.5L block engine specifically designed for the Subaru Impreza WRX STI models produced between 2008 and 2021. This engine upgrade is for those who are seeking to boost the power output of their STI from the standard 305 horsepower to an impressive 550 horsepower.

The IAG Performance IAG-ENG-L550N engine is a precision-engineered component that adheres to the highest standards of quality and performance. It is a fully balanced and blueprinted engine block, ensuring optimal power delivery and durability. The block itself is made from an upgraded material, providing enhanced strength and resistance to wear and tear.

The engine features a high-performance forged crankshaft, connecting rods, and pistons. These components are designed to withstand the increased power and torque output of the engine, ensuring reliable and consistent performance. The forged pistons also provide improved compression and reduced weight, contributing to enhanced power output.

The IAG Performance IAG-ENG-L550N engine is equipped with a high-flow cylinder head that allows for improved airflow and gas exchange. This results in increased power output and improved engine efficiency. The cylinder head also features upgraded valves and valve guides, ensuring smooth and reliable valve operation.

The engine is also fitted with a high-performance camshaft and camshaft gearset, which provide improved valve timing and lift. This results in increased power output throughout the rev range, as well as improved throttle response and engine response.

The IAG Performance IAG-ENG-L550N engine is also equipped with a high-performance fuel system, including upgraded fuel injectors and a high-flow fuel pump. This ensures that the engine receives the fuel it needs to produce the increased power output, while also maintaining optimal fuel efficiency.

The engine also features a high-performance oiling system, including an upgraded oil pump and oil cooling system. This ensures that the engine is adequately lubricated, even under high-performance driving conditions.

The IAG Performance IAG-ENG-L550N engine is designed to be a direct replacement for the stock engine in the Subaru Impreza WRX STI. It comes with all necessary gaskets, seals, and hardware for a hassle-free installation. The engine also includes a new engine management system, which is calibrated to work seamlessly with the engine and provide optimal performance.

In summary, the IAG Performance IAG-ENG-L550N is a high-performance engine upgrade for the Subaru Impreza WRX STI, designed to deliver an impressive 550 horsepower. It is a fully-balanced and blueprinted engine block, featuring forged crankshaft, connecting rods, and pistons, high-flow cylinder head, high-performance camshaft and camshaft gearset, high-flow fuel system, and a high-performance oiling system. It is a direct replacement for the stock engine and comes with all necessary hardware for a hassle-free installation.

The IAG Performance IAG-ENG-L550N 550bhp 2.5L block engine is a popular aftermarket option for those looking to significantly increase the power output of their 2008-2021 Subaru Impreza WRX STI. Here are some pros and cons of this engine upgrade:

1. Increased power: The primary reason to consider this engine upgrade is the substantial power increase. The IAG Performance engine delivers 550 bhp, which is a significant jump from the standard 305 bhp of the stock engine.

2. Improved durability: The IAG Performance engine is designed to handle the increased power output and the demands of high-performance driving. It features upgraded components such as forged pistons, forged connecting rods, and a billet crankshaft.

3. Better reliability: The forged components help improve the engine's reliability, as they are less prone to failure than the cast parts in the stock engine.

4. Enhanced performance: The IAG Performance engine delivers better throttle response and overall performance, making it a popular choice among enthusiasts.

5. Customizability: The IAG Performance engine is a drop-in replacement, which makes it easy to install and customize.

1. Cost: The IAG Performance engine is a significant investment, with a price tag that can range from $15,000 to $20,000 or more, depending on the installation costs and any additional modifications required.

2. Complex installation: Installing the IAG Performance engine requires specialized knowledge and tools, making it a complex and time-consuming process.

3. Increased maintenance: With increased power comes increased maintenance requirements. The IAG Performance engine will require more frequent oil changes and other routine maintenance to ensure optimal performance.

4. Potential for voided warranty: Installing an aftermarket engine may void the factory warranty on the vehicle, which is something to consider before making the upgrade.

The IAG Performance IAG-ENG-L550N 550bhp 2.5L block engine is an excellent choice for those looking to significantly increase the power output and performance of their 2008-2021 Subaru Impreza WRX STI. With its improved durability, reliability, and customizability, it is a popular choice among enthusiasts. However, the significant investment required, complex installation, increased maintenance, and potential for voided warranty are important considerations before making the upgrade.

If you are serious about increasing the power output and performance of your 2008-2021 Subaru Impreza WRX STI, the IAG Performance IAG-ENG-L550N 550bhp 2.5L block engine is an excellent option to consider. However, before making the investment, carefully weigh the pros and cons, and ensure that you have the necessary resources, including the budget, specialized knowledge, and tools, to complete the installation process. If you are unsure, consider consulting a professional mechanic or performance shop for guidance.

Details:

The Long Blocks feature a combination of proven IAG 550 Performance Short Block and Cylinder Head package, along with other race-proven components to complete the assembly. All components included are BRAND NEW. The IAG Performance Hand-Built 550 Subaru EJ25 Long Block Packages are a complete, valve cover-to-valve cover, crate engine. Brand new IAG 550 long block for 2015 2021 Subaru WRX STI.

part #: iagengl550n prices

• $169.99-$324.57

specifications grokengines:

• for models: Sti, 550
• for years: 2008-2021
• brand: Iag Performance
• mpn: Iag-eng-l550n
• type: Engine Long Block
• engine size: 2.5 L
• block type: Flat
• number of valves: 16
• country/region of manufacture: United States
• fuel type: Gasoline

seller grokengines:

• # reviews: 364
• rating: 100.0%
• city: Hempstead, New York

offer grokengines:

• started: March 18, 2025
• availability: In Stock
• options: Seller-arranged-local-pickup
• sold: 0
• quantity: 1

general grokengines:

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

returns grokengines:

• policy: No Returns

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