Manley Performance Pistons
Fits Subaru WRX STI 2004+ with EJ257 Engine
Part #: 612105C-4
Overview
The Manley Platinum Series piston set is a high-performance upgrade designed specifically for Subaru WRX STI models equipped with the EJ257 engine. Crafted from premium 2618 alloy forgings, these pistons deliver exceptional strength, durability, and thermal stability, making them ideal for enthusiasts and professional tuners seeking reliable power support. Whether you're building a high-performance street car or a dedicated track machine, these pistons help optimize engine response and longevity, ensuring your vehicle performs at its best under demanding conditions.
Key Features
Designed with precision and quality, the Platinum Series pistons feature proven cam and barrel skirt profiles for efficient combustion and reduced friction. The moly skirt coatings on select part numbers enhance wear resistance and reduce piston slap, contributing to smoother operation. Equipped with tool steel wrist pins, these pistons provide secure and durable connections to the connecting rods, supporting high RPM and power levels. The 100mm stroke and +0.5mm bore size are engineered to match the EJ257's specifications, ensuring a perfect fit and optimal performance.
Construction & Design
These pistons are manufactured with advanced forging techniques using 2618 alloy, known for its excellent strength-to-weight ratio and thermal properties. The moly skirt coatings and carefully engineered profiles help manage heat and reduce wear, extending engine life even under high-stress conditions.
Performance & Response
The design of these pistons supports improved combustion efficiency and responsiveness, making them suitable for high-performance builds. They help sustain reliable power delivery and support tuning efforts aimed at increasing horsepower and torque.
Installation & Fitment
Installation requires standard engine assembly procedures, with precise matching to the EJ257 engine specifications. Proper clearance and torque specifications should be followed to ensure optimal performance and longevity.
What's Included
The set includes pistons, moly-coated skirts on select parts, and tool steel wrist pins, providing everything needed for a complete upgrade.
Ideal For
Ideal for engine builders, tuners, and Subaru enthusiasts looking to enhance their vehicle’s durability and performance with high-quality forged pistons designed for the EJ257 engine.
