JE Pistons Subaru EJ25 Ultra Series Piston Set with 99.50mm Bore Diameter and 8.5:1 Compression Ratio

Description

The JE Pistons Ultra Series for Subaru EJ25 engines offers industry-leading forged pistons designed for high-performance applications. Constructed with JE’s proprietary Aligned Grain Flow forging technology, these pistons provide exceptional tensile strength to withstand the extreme cylinder pressures generated by power-adder setups and high-horsepower builds. Featuring a 99.50mm bore diameter and a compression ratio of 8.5:1, these pistons are ideal for enthusiasts seeking durability and performance in their turbocharged or supercharged engines. Each piston is manufactured entirely in the USA, ensuring quality and precision.

The Ultra Series pistons include advanced features such as a thermal barrier crown coating, which reflects heat back into the combustion chamber, reducing piston crown temperatures and aiding in more efficient exhaust gas scavenging. The high-strength wrist pins, manufactured by Trend Performance, are designed for demanding high-performance applications, providing reliable operation under intense conditions. Skirt coatings are applied to reduce friction and wear on piston skirts and cylinder walls, improving longevity and reducing cold start noise. Optimized pin oiling ensures proper lubrication of the wrist pins, minimizing heat and friction for smoother engine operation.

Additional features include lateral gas ports that help maintain a strong ring seal at high RPM and boost levels, ensuring consistent power delivery. Every aspect of these pistons has been engineered to support high-horsepower racing engines, making them suitable for forced induction setups and extreme performance builds. Designed for durability and maximum performance, JE Ultra Series pistons are a reliable choice for Subaru EJ25 engines in high-stress environments, providing peace of mind during demanding driving conditions.

Features:

• Aligned Grain Flow Technology: Maximizes tensile strength for high-stress engine environments

• Thermal Barrier Crown Coating: Reflects heat to reduce piston crown temperatures and improve exhaust scavenging

• High-Strength Wrist Pins: Designed for high-performance and power-adder applications

• Skirt Coating: Reduces friction, wear, and cold start noise

• Optimized Pin Oiling: Ensures proper lubrication to reduce heat and wear

• Lateral Gas Ports: Maintain ring seal at high RPM and boost levels

• Designed for Power: Engineered to support high-horsepower racing engines

• Made 100% in the USA