JE Pistons 291059 Forged Piston Kit for 2002-2021 Subaru WRX STI EJ257 Block

Vehicle Fitment

• 2002-2005 Subaru WRX (EJ257 block with EJ20 heads)
• 2006-2021 Subaru WRX STI (EJ257 block with EJ20 heads)

Features

• Forged from 2618 T6 high tensile aluminum for superior strength
• Designed specifically for high-performance applications
• Inverted dome/dish piston design for optimal combustion efficiency
• FSR (Forged Side Relief) forging design reduces friction and weight
• Includes JE Pro Seal piston rings for enhanced sealing
• Wrist pins with a diameter of 0.905 inches and length of 2.250 inches
• Pin fitting and Tru Arc locks included for secure installation
• Compression ratio of 8.5:1 for balanced performance

Specifications

• Bore Diameter: 99.52 mm (3.917 inches)
• Compression Height: 1.209 inches
• Piston Volume: -25.50 cc
• Piston Material: 2618 T6 forged aluminum
• Wrist Pin Diameter: 0.905 inches
• Wrist Pin Length: 2.250 inches
• Ring Widths: 1.2 mm (top and second rings), 2.5 mm (oil ring)
• Compression Ratio: 8.5:1

Included Components

• 4x JE Pistons 291059 forged pistons
• 4x JE Pro Seal piston rings
• 4x Wrist pins (0.905 inches x 2.250 inches)
• 4x Pin fitting and Tru Arc locks

Product Description

The JE Pistons 291059 Forged Piston Kit is engineered for high-performance applications in Subaru vehicles equipped with an EJ257 engine block and EJ20 cylinder heads. This hybrid configuration is popular among enthusiasts seeking to enhance engine performance while maintaining reliability.

Manufactured from 2618 T6 high tensile forged aluminum, these pistons offer superior strength to withstand the demands of high-performance driving. The inverted dome/dish piston design ensures optimal combustion efficiency, contributing to improved power output. The FSR forging design reduces friction and weight, enhancing overall engine responsiveness.

The kit includes JE Pro Seal piston rings for enhanced sealing, ensuring consistent compression and minimizing blow-by. The wrist pins, measuring 0.905 inches in diameter and 2.250 inches in length, are designed for secure installation and durability. With a compression ratio of 8.5:1, this piston kit provides a balanced performance suitable for various driving conditions.

Ideal for applications ranging from street performance to motorsport, the JE Pistons 291059 Forged Piston Kit offers the durability and performance needed to achieve your engine building goals.