JE Pistons Ultra Series Subaru EJ205 92.5mm Bore 8.5:1 CR Set of 4 Pistons

Ultra Series forged pistons from JE are the industry?s strongest, most fully featured pistons available off the shelf. Offered for a wide range of import and sport compact applications from 2JZ to 4G63 and Audi to BMW, Ultra Series pistons feature JE?s proprietary Aligned Grain Flow forging technology providing next-level tensile strength ideal for the extreme cylinder pressures of power adder engine builds. Equipped with custom level features including thermal barrier crown coating, skirt coating, gas ports, and more, Ultra Series are the ideal pistons for your high-boost build. As with all JE Pistons products, Ultra Series pistons are made 100% in the USA. JE Ultra, Subaru, EJ Series, 3.642 in. Bore, 8.50:1, Inverted Dome/Dish, 4 Cyl. Piston Kit These pistons utilize our dedicated Forged Side Relief (FSR) forging that was specifically designed to increase strength.

• Aligned Grain Flow Technology: Exclusively available on JE Ultra Series, this proprietary, in-house forging process maximizes tensile strength to withstand the stresses of high-performance engine environments
• Thermal Barrier Crown Coating: This ceramic-based coating reflects heat into the combustion chamber, therefore reducing piston crown temperatures and improving exhaust gas scavenging
• High-Strength Wrist Pins: Premium thick-wall wrist pins are manufactured by Trend Performance in the USA and are designed for the demands of high-performance/power-adder builds
• Skirt Coating: Reduces friction and wear on piston skirts and cylinder walls while simultaneously reducing operating noise, especially on cold start
• Optimized Pin Oiling: Enhanced pin oiling features keep pin, pin bores, and small-end lubricated for reduced heat, friction, and wear
• Lateral Gas Ports: Help maintain power-producing ring seal at the top compression ring, even in high RPM and high boost situations
• Designed for Power: Every feature on Ultra Series Pistons are optimized to perform high-horsepower racing engines
• Made 100% in the USA

Upgrade your high-performance Subaru EJ205 engine with the JE Pistons Ultra Series, featuring a 92.5mm bore and a compression ratio of 8.5:1. These forged pistons are designed for demanding applications, including turbocharged and power-adder builds, offering exceptional strength and durability. Crafted using JE’s proprietary Aligned Grain Flow forging technology, these pistons deliver enhanced tensile strength, making them ideal for high cylinder pressures common in racing and high-boost setups. Every piston is made 100% in the USA, ensuring quality and precision for your engine build.
The Ultra Series pistons incorporate advanced features such as thermal barrier crown coating, which reflects heat back into the combustion chamber, effectively reducing crown temperatures and aiding in better exhaust gas scavenging. The skirt coating minimizes friction and wear on piston skirts and cylinder walls, reducing noise during cold starts and improving overall longevity.
Designed with high-strength Trend Performance wrist pins, these pistons provide reliable performance under extreme conditions. Lateral gas ports are integrated to maintain optimal ring seal at high RPM and boost levels, ensuring consistent power output. The pistons' pin oiling system enhances lubrication, reducing heat, friction, and wear on critical components. Whether building a turbocharged or supercharged engine, the JE Ultra Series pistons are engineered to withstand the rigors of high-horsepower racing engines, making them a dependable choice for enthusiasts seeking maximum performance and durability.
These pistons are not CARB approved and require acknowledgment of this fact before installation. They are suitable for automotive applications where high performance is desired, and their advanced features make them a top choice for engine builders aiming for competitive or high-power street builds.

Features:

• Aligned Grain Flow Technology maximizes tensile strength for high-stress environments

• Thermal Barrier Crown Coating reduces crown temperatures and improves combustion efficiency

• High-Strength Wrist Pins designed for demanding high-performance applications

• Skirt Coating reduces friction, wear, and noise during cold starts

• Optimized Pin Oiling system enhances lubrication and reduces heat and wear

• Lateral Gas Ports maintain effective ring seal at high RPM and boost levels

• Designed specifically for high-horsepower racing and power-adder engines

• Made 100% in the USA for quality assurance