fits model: Wrx, Sti. make: Subaru. year: 2004–2014.

( Brand: Arias Pistons ), ( Manufacturer Part Number: 3620335 ), ( UPC: 753760201254 )
The 2004-14 Arias pistons 100mm for the Subaru EJ257 2.5L WRX STI engine, with part numbers 3620335 and 753760201254, are a high-performance upgrade for your vehicle's engine. These pistons are designed specifically for the Subaru EJ257 engine, ensuring a perfect fit and optimal performance.
The Arias pistons are made from forged 2618-T6 aluminum alloy, which is known for its strength and durability. This material allows the pistons to withstand high compression ratios and extreme temperatures, making them ideal for high-performance applications. The pistons also feature a multi-ring design, which includes a compression ring, oil control ring, and top ring, to help reduce friction and ensure proper oil control.
The piston skirts on these Arias pistons are honed to a mirror finish, which reduces friction with the cylinder wall and helps to increase engine efficiency. The pistons also feature a redesigned crown that allows for a higher compression ratio, which can help to increase horsepower and torque.
The Arias pistons are also equipped with a floating wrist pin, which allows the pin to move freely within the piston, reducing friction and reducing the likelihood of engine knocking. The piston rings are made from high-quality materials and are designed to fit tightly within the piston, reducing the likelihood of oil leaks and engine blowby.
Overall, the 2004-14 Arias pistons 100mm for the Subaru EJ257 2.5L WRX STI engine are a high-quality, high-performance upgrade for your vehicle's engine. With their strong and durable construction, reduced friction, and improved compression ratio, these pistons can help to increase horsepower and torque, while also improving engine efficiency and reducing the likelihood of engine failure.
Pros of buying 2004-14 Arias pistons 100mm for Subaru EJ257 2.5L WRX STI:1. High-quality materials: Arias pistons are known for their high-grade materials, such as forged aluminum alloy and chrome-moly steel, which ensure durability and reliability.
2. Improved performance: Upgrading to Arias pistons can result in increased horsepower and torque, as well as better throttle response and overall engine performance.
3. Enhanced engine life: The improved performance and durability of Arias pistons can help extend the life of the engine, saving you money in the long run.
Cons of buying 2004-14 Arias pistons 100mm for Subaru EJ257 2.5L WRX STI:1. Higher cost: Arias pistons are typically more expensive than OEM (original equipment manufacturer) pistons, which may be a deterrent for some buyers.
2. Installation complexity: The installation of Arias pistons can be more complex than OEM pistons, requiring specialized tools and knowledge to ensure proper fit and function.
3. Potential engine tuning needed: Depending on the specific modifications and tuning of your Subaru, the installation of Arias pistons may require additional engine tuning to ensure optimal performance and safety.
Conclusion:If you are looking to improve the performance and durability of your Subaru EJ257 2.5L WRX STI engine, upgrading to 2004-14 Arias pistons 100mm can be a worthwhile investment. However, be prepared for a higher cost and potential installation complexity, as well as the possibility of needing additional engine tuning. It is recommended to consult with a knowledgeable mechanic or engine specialist to ensure that the installation and tuning of Arias pistons are done properly and safely.
Gram part required in mm height cc w stock head wt.
Arias Pistons 100mm 9.
012 bore comp. 110 rod: 5.
137 head cc: 51. 5l Wrx Sti Subaru EJ257 offset pin hole. Dome compression ratio comp. 5mm Wrx Sti 2004 and up stock bore: 3.
Purchase from map to receive aggressive pricing and retain your manufacturers warranty.
5mm stroke: 3.