Wiseco K705M100 Forged Piston Kit 100mm Bore for Subaru EJ257

The Wiseco K705M100 is a high-performance forged piston kit engineered specifically for Subaru WRX STi EJ257 engines with a 100mm bore size. This Sport Compact series piston kit is manufactured from dedicated forgings produced in-house, delivering a lightweight design with superior strength and optimal performance characteristics.

Key Features:

• Forged from high-silicon, low-expansion aluminum alloy for superior strength and reduced weight
• Improved heat transfer and extended service life compared to cast pistons
• Diamond-turned finish from CNC computer-controlled machining centers ensures perfect surface finish with no size variation
• Computer-engineered piston skirt profiles minimize cylinder wall friction
• Lightweight forging provides instant throttle response and maximum torque
• Engineered and manufactured in the USA in Mentor, Ohio

Complete Kit Includes:

• Precision-crafted forged piston(s)
• High-quality piston rings for optimal cylinder seal
• Chromium alloy steel wrist pins
• Circlips (retaining clips)

Backed by over 80 years of Wiseco engineering expertise, this piston kit is designed for enthusiasts seeking reliable performance upgrades or precision engine rebuilds. The K705M100 delivers the perfect balance of durability, performance, and value for high-performance street and racing applications.