
( Brand: Je Pistons ), ( Manufacturer Part Number: 325251 ), ( Part Type: Head Compression ), ( Engine Codes: Ej255 Ej257 W/ Ej20 Head ), ( Vehicle Make: Subaru )
Introducing our high-performance 100.0mm FK-Series (FSR) pistons, specifically designed for EJ257 and EJ20 engines with 9.5 compression. These pistons are engineered to provide superior power and durability, making them an excellent choice for performance enthusiasts and race car builders.
Our FSR pistons are made from forged 2618-T6 aluminum alloy, ensuring superior strength and rigidity. The piston crown is optimized with a dish shape and a quench-type oil ring groove, which reduces friction and improves ring seal. The piston skirt features a full-floating, two-piece ring carrier design, which reduces side load and improves piston ring life.
These pistons are equipped with a 9.5 compression ratio, providing an excellent balance of power and efficiency. The pistons also feature a chamfered top ring land, which reduces the chances of ring groove damage during installation. The piston rings themselves are made from high-quality steel, with a nitrided coating for increased durability and reduced friction.
The piston pin is made from high-strength steel and features a double-grenade design for improved strength and durability. The pin is also equipped with a phosphate coating, which reduces friction and improves wear resistance.
In addition to their high-performance features, our FSR pistons are also designed to fit seamlessly into your engine. They are precision-machined to ensure a perfect fit, and they come with oversized piston pins for improved clearance.
Overall, our 100.0mm FSR pistons are a high-quality, high-performance upgrade for your EJ257 or EJ20 engine. They are designed to provide superior power, durability, and efficiency, making them an excellent choice for anyone looking to maximize the performance of their engine.
Part Number: 325251
SKU: 325251
Brand: Your Brand Name
Manufacturer: Your Manufacturer Name
Type: Performance Pistons
Application: EJ257 and EJ20 Engines
Compression Ratio: 9.5:1
Material: Forged 2618-T6 Aluminum Alloy
Diameter: 100.0mm
Piston Ring Material: High-Quality Steel with Nitrided Coating
Piston Pin Material: High-Strength Steel with Phosphate Coating
Piston Pin Design: Double-Grenade
Piston Ring Carrier: Full-Floating, Two-Piece Design
O-Ring Groove: Quench-Type
Piston Crown: Optimized Dish Shape
Piston Skirt: Chamfered Top Ring Land
Fitment: OEM Replacement or Performance Upgrade
Installation: Professional Installation Recommended
Warranty: Your Warranty Policy
Packaging: Individually Packed in Anti-Static Bags
Quantity: 1 Piston Set (2 Pistons)
Weight: Approximately 1.6 kg (3.5 lbs) per Set
Dimensions: Approximately 110 x 85 x 60mm (4.3 x 3.3 x 2.4 in) per Piston
Compatible Engines: Subaru EJ257 and EJ20 Engines
Compatible Engine Series: Subaru Impreza WRX, Subaru Legacy GT, Subaru Forester STI, Subaru Outback XT, and other compatible applications.
Important Note: These pistons are designed for high-performance applications and may require additional modifications to your engine, such as upgraded valve springs, camshaft, and head gaskets. It is highly recommended to consult with a professional mechanic or engine builder before installing.
This product is covered under our standard warranty policy, which can be found on our website or by contacting our customer service department. If you have any questions or concerns about this product, please do not hesitate to contact us. We are here to help!
Pros of buying 100.0mm je FSR pistons for EJ257/EJ20 engines with 9.5 compression and part number 325251:1. Increased engine performance: The larger piston size allows for greater combustion volume, potentially leading to increased power output.
2. Improved compression ratio: With a compression ratio of 9.5:1, the pistons can help to support efficient combustion and increased horsepower.
3. Enhanced durability: The pistons are designed with reinforced materials, such as forged alloy, which can help improve engine longevity.
4. Better thermal management: The pistons may feature cooling grooves or other features to help dissipate heat and reduce the risk of detonation or engine failure.
Cons of buying 100.0mm je FSR pistons for EJ257/EJ20 engines with 9.5 compression and part number 325251:1. Potential engine fitment issues: Depending on the specific engine and component clearances, the larger piston size may cause interference with other engine components, such as the cylinder head or valve train.
2. Higher cost: These aftermarket pistons may be more expensive than OEM (original equipment manufacturer) pistons, requiring a higher upfront investment.
3. Potential need for other modifications: To ensure proper engine operation and performance with the larger pistons, additional modifications, such as upgraded cylinder heads or camshafts, may be necessary.
4. Increased risk of engine knock or detonation: With higher compression ratios, there is an increased risk of engine knock or detonation, which can lead to engine damage if not addressed properly.
Recommendation:The 100.0mm je FSR pistons for EJ257/EJ20 engines with 9.5 compression and part number 325251 can provide improved engine performance and durability, but they also come with potential fitment and cost considerations. If considering these upgraded pistons, it is essential to ensure proper engine clearances and component compatibility, as well as to consider the potential need for additional modifications to support increased engine performance. Prospective buyers should weigh the benefits against the potential risks and consult with a qualified mechanic or performance specialist to determine if these pistons are the right choice for their specific engine application.
No cylinder head modifications necessary.
This is a top of the line piston that one would use to build ultimate street engine or reliable race.
Pin fitting and true arc locks included Je pro seal rings piston profile matches EJ20 chamber subaru EJ257 block with head note: now compatible either oem or aftermarket rods. 5:1 compression piston profile matches for EJ20 combustion chamber.
No cylinder head modifications necessary car make: subaru model: impress Rx years: engine: ej255 EJ257 w EJ20 included ring set: jg4904-3937 compression ratio: 9. 7mm rod length : 130. 5mm stroke: 79mm bore: 100mm material: 2618 bore size: 0.
Piston profile matches EJ20 combustion chamber. 2 x straight wall carbon steel wrist pin provided. Je Pistons new fsr forgings are both strong and lightweight.
No cylinder head modifications necessary this is a set of 4 Pistons. Note: piston profile matches for EJ20 combustion chamber. 5mm ring width s. These particular Pistons can be used with oem or aftermarket rods.
Dome and dishes feature smooth flowing radii for excellent flame travel.
Je has lead the piston market since very beginning.
The new fsr design has undergone extensive on-track testing to ensure flawless performance under most demanding conditions.