Manley Performance 04+ Subaru WRX/STI EH257 99.5mm Bore Dish Piston Set – 8.5:1 Compression

Description

The Manley Performance 04+ Subaru WRX/STI EH257 piston set is engineered for high-performance applications, combining durability with precision engineering. Crafted from domestic 2618 alloy forgings, these pistons deliver superior strength and resilience under demanding conditions. The use of proven cam and barrel skirt profiles ensures optimal power output while minimizing stress on engine components. Chrome Moly wrist pins are included as standard, providing reliable connection points that withstand high loads, with optional upgrades to 9310 and Turbo Tuff/DLC alloys for enhanced durability in aggressive tuning scenarios.
Designed with strict standards for ring lands and grooves, these pistons promote excellent ring seal and consistent compression, which translates into more power and efficiency. The unique fixturing process used by Manley enables the machining of skirt turning and ring grooves in a single operation, guaranteeing precise alignment and squareness between the ring land and skirt for optimal performance. The dish design of these pistons reduces compression to 8.5:1, making them suitable for turbocharged engines where controlled boost and reliable performance are essential.
Ideal for professional engine builders and tuners, the Manley EH257 piston set combines innovative manufacturing techniques with high-quality materials to ensure durability and consistent performance. Whether you’re building a high-performance daily driver or a race-ready engine, these pistons help maximize power output while maintaining longevity. The set is compatible with Subaru WRX and STI models from 2004 and newer, providing a reliable upgrade for those seeking to improve engine response and tuning potential.

Features:

• 2618 alloy forgings for high strength and durability

• Chrome Moly wrist pins included, with optional high-performance upgrades

• Exacting ring lands and grooves for improved sealing and power

• Cam and barrel profiles designed for optimal power and minimal wear

• Unique fixturing process ensures precise machining and squareness