fits model: Ej25, 550, Street. make: Subaru.

( Brand: Iag ), ( Manufacturer Part Number: IAG-ENG-H550-OPT ), ( Type: Short Block ), ( Items Included: Camshaft, Connecting Rod, Cylinder Head Castings, Exhaust Valves, I-beam, Intake Valves, Rod Bolt, Rod Cap, Rod Nut, Titanium Retainers, Valve Springs, Valve Stem Seals ), ( Material: Forged ), ( Country/region Of Manufacture: United States ), ( Performance Part: Yes )
The IAG IAG-ENG-H550-OPT 550 2.5L EJ25 Subaru Block Street Cylinder Head is a high-quality performance upgrade for Subaru engine enthusiasts. This cylinder head is designed to provide improved power, durability, and reliability over the stock OEM part.
The IAG 550 cylinder head is crafted from a forged aluminum alloy block, which provides exceptional strength and heat dissipation. The cylinder head features oversized valves and ports, which allow for increased air and fuel flow, resulting in improved combustion efficiency and power output. The cylinder head also comes with a high-performance camshaft and valvetrain, which allows for greater valve lift and duration, further enhancing power and torque.
This cylinder head is designed to work with the EJ25 engine, which is found in many Subaru models, including the Impreza, WRX, and Forester. The IAG 550 cylinder head is also compatible with a variety of aftermarket intake and exhaust systems, making it a versatile upgrade for a wide range of Subaru applications.
In addition to its power gains, the IAG 550 cylinder head is also designed with durability in mind. The cylinder head features a thicker deck surface, which helps to prevent warping and distortion under high-power conditions. The cylinder head also comes with reinforced valve springs and retainers, which help to reduce the risk of valve float and damage.
Overall, the IAG IAG-ENG-H550-OPT 550 2.5L EJ25 Subaru Block Street Cylinder Head is a high-performance upgrade that provides improved power, durability, and reliability over the stock OEM part. It is a great choice for Subaru enthusiasts who are looking to take their engine to the next level.
Pros of buying IAG IAG-ENG-H550-OPT 2.5L EJ25 Subaru block and cylinder head:1. Improved Performance: This aftermarket replacement block and cylinder head are designed to provide increased horsepower and torque, making your Subaru engine more powerful.
2. Enhanced Durability: IAG components are engineered to withstand higher engine loads, providing improved reliability and longevity compared to OEM parts.
3. Upgraded Materials: The IAG block and cylinder head are made from higher-quality materials than OEM parts, such as forged pistons, stronger connecting rods, and hardened valve seats, which can help reduce engine failure and improve engine life.
4. Upgraded Cylinder Head: The IAG cylinder head includes larger valves, improved port flow, and higher-lift camshafts, which can help improve engine breathing and power output.
5. Better Cooling: The IAG block and cylinder head are designed with improved cooling systems, including larger cooling passages and water jackets, which can help prevent overheating and engine failure.
Cons of buying IAG IAG-ENG-H550-OPT 2.5L EJ25 Subaru block and cylinder head:1. Cost: Aftermarket parts, such as the IAG block and cylinder head, can be more expensive than OEM parts.
2. Installation Complexity: Installing aftermarket parts can be more complicated than installing OEM parts, as it may require specialized tools and knowledge.
3. Potential Compatibility Issues: It's important to ensure that the IAG block and cylinder head are compatible with your specific Subaru model and engine configuration.
4. Warranty: Aftermarket parts may not be covered under the manufacturer's warranty, which could result in additional costs for repairs or replacements.
Conclusion: If you're looking to improve the performance and durability of your Subaru EJ25 engine, the IAG IAG-ENG-H550-OPT 2.5L block and cylinder head are a good option. However, it's important to consider the additional costs, installation complexity, and potential compatibility issues before making a purchase.
Recommendation: If you're comfortable with the installation process and can afford the additional cost, the IAG IAG-ENG-H550-OPT 2.5L block and cylinder head can provide improved performance and durability for your Subaru EJ25 engine. However, it's important to do your research and ensure that the parts are compatible with your specific Subaru model and engine configuration before making a purchase.
Whats included: Case / Main Bolts - Standard FHI Subaru case bolt. IAG 550 2.5L Subaru Short Block for WRX, STI, Legacy GT, Forester XT - BHP. The case haves are carefully measured and assembled using a new 2017 Subaru 2.5L nitrite treated STI crankshaft, which is matched to ACL or King race main bearings. Along with the camshafts we'll include all new OEM valve lifter buckets and set bench lash using our specially designed fixture.
In Good condition pass as brand-new. Each IAG 550 Short Block starts with brand new EJ25 Subaru 2.5L, 99.5mm stock bore engine case halves as standard. Ultrasonic Cleaning. The case halves are sealed with new OEM main bolts and sealant.
Multi-Angle Valve Job. Machined Cam Lobe Clearance. The IAG 550 short block features Spec H-Beam forged connecting rods.