JE Pistons Subaru STI EJ257 99.75mm Bore CR 9.5 Kit – High-Performance Forged Pistons for Subaru Engines

Description

Enhance your Subaru STI EJ257 engine with the JE Pistons Part Number 310937, a premium forged piston kit designed for high-performance applications. Crafted from 2618 aluminum in the USA, these pistons deliver exceptional strength and durability under demanding conditions. The kit includes four pistons, each featuring a 99.75mm bore, a 9.50:1 compression ratio, and an inverted dome/dish design optimized for maximum power output. Whether you’re building a race engine or upgrading for street performance, these pistons are engineered to meet the exact specifications required for your Subaru engine to deliver consistent and reliable performance.

JE Pistons utilizes proprietary Forged Side Relief (FSR) forging technology to minimize friction and reduce power loss. The design incorporates a shorter wrist pin and a reduced skirt width, resulting in lower weight and improved efficiency. The pistons also feature an accumulator groove (application-dependent) that helps reduce pressure from combustion gases, decreasing ring flutter and enhancing ring seal for stable power delivery. A skirt coating further reduces friction, wear, and noise, extending the life of your engine components while maintaining optimal performance. The kit comes complete with high-quality wrist pins, locks, and JE Pro Seal premium piston rings, ensuring a reliable fit and seal.

Manufactured entirely in the USA, these JE Pistons are specifically engineered for each engine and application, providing an ideal balance of strength, weight, and performance. They are designed to withstand high engine demands, making them suitable for racing, drifting, or high-performance street use. Please note that these pistons are not CARB approved and require acknowledgment of this for installation. Their robust construction and precision design make them an excellent choice for enthusiasts seeking to maximize engine potential while maintaining durability and reliability.

Features:

• Proprietary Forged Side Relief (FSR) forging design minimizes friction and power loss

• Accumulator groove helps reduce pressure from combustion gases, improving ring seal

• Skirt coating reduces friction, wear, and operating noise

• Forged in the USA from high-strength 2618 aluminum for demanding performance

• Engineered specifically for Subaru EJ257 engines and various applications

• Includes high-quality wrist pins, locks, and JE Pro Seal piston rings