Manley Performance Pistons
Fits 2004+ Subaru WRX STi with EJ257 Engine
Part #: 621000C-4
Overview
The Manley Platinum Series pistons are high-performance engine components designed for enthusiasts and professional tuners seeking durability and consistent power output. Crafted from premium 2618 alloy forgings, these pistons are engineered to withstand the rigors of high-performance applications, making them ideal for turbocharged Subaru WRX STi engines. Whether you're building a race-ready setup or enhancing your daily driver, these pistons provide reliable performance and longevity, supporting your engine's response and efficiency under demanding conditions.
Key Features
Built with advanced materials and precision engineering, the Platinum Series pistons feature:
- 2618 aluminum alloy forgings for superior strength and thermal stability
- Proven cam and barrel skirt profiles for optimal fit and durability
- Tool steel wrist pins for enhanced wear resistance
- Moly skirt coatings on select models to reduce friction and improve wear characteristics
- 75mm bore size tailored for EJ257 engines
- Designed with a 8.5:1 compression ratio for a balance of power and reliability
- Engineered for high-performance turbocharged applications
Construction & Design
These pistons are crafted from high-quality 2618 alloy, known for its excellent strength-to-weight ratio and thermal properties. The moly skirt coatings help reduce friction and wear, ensuring long-lasting performance even under high stress. The precise cam and barrel skirt profiles contribute to optimal piston stability and reduced piston slap, enhancing engine response and smoothness.
Performance & Response
Designed to support high-performance builds, these pistons help improve engine response and power delivery. Their robust construction ensures durability during aggressive tuning and spirited driving, while the optimized design maintains consistent compression and combustion efficiency.
Installation & Fitment
These pistons are engineered specifically for 2004 and newer Subaru WRX STi models equipped with the EJ257 engine. Proper installation requires standard engine rebuilding procedures and compatible components. Professional installation is recommended to ensure optimal performance and longevity.
What’s Included
The package includes a complete set of pistons with moly skirt coatings and necessary rings, designed to support a high-performance rebuild of your EJ257 engine.
