Manley Performance Manley 98+ Subaru WRX (EJ205) STD Stroke 93mm +1mm Bore 8.5:1 Dish Piston Set with Rings

Fitment Summary

Part #: 615010C-4

Overview

The Manley Platinum Series piston set is engineered for high-performance Subaru WRX engines, specifically designed for models with the EJ205 engine platform from 1998 and onwards. Crafted from premium 2618 alloy forgings, these pistons are built to withstand the rigors of spirited driving, tuning, and racing applications. Ideal for engine builders and tuners seeking durability, consistency, and superior performance, this piston set helps optimize compression ratios and engine response while maintaining excellent thermal stability and wear resistance. Whether you're rebuilding or upgrading your engine, these pistons provide a reliable foundation for increased power and longevity.

Key Features

Designed with precision and durability in mind, the Manley Platinum Series pistons feature a robust construction that supports high-performance applications. Key features include:

• Made from high-strength 2618 alloy forgings for superior toughness
• Standard stroke with 93mm bore, +1mm overbore for optimal fitment
• 8.5:1 compression ratio for a balance of power and reliability
• Tool steel wrist pins for enhanced durability and reduced wear
• Moly skirt coatings on select models to reduce friction and improve wear resistance
• Proven cam and barrel skirt profiles for consistent performance
• Designed to support high RPM operation and aggressive tuning setups

Construction & Design

These pistons are crafted from high-quality 2618 alloy forgings, known for their excellent strength-to-weight ratio and thermal properties. The moly skirt coatings help reduce friction and enhance durability during high-stress engine cycles. The design incorporates proven profiles that optimize airflow and combustion efficiency, making them suitable for high-performance rebuilds and tuning projects.

Performance & Response

The Manley Platinum Series pistons are engineered to support increased power output and engine responsiveness. Their robust construction ensures reliable operation under high RPM conditions, while the precise fitment helps maintain optimal compression and combustion efficiency. This results in improved throttle response, smoother power delivery, and enhanced overall engine performance.

Installation & Fitment

These pistons are designed for straightforward installation in compatible EJ205 engines with a 93mm bore and +1mm overbore specifications. Proper installation requires standard engine rebuilding procedures and attention to clearances. It is recommended to consult with a professional engine builder for optimal results.

What’s Included

The package includes a complete set of pistons with moly skirt coatings, tool steel wrist pins, and matching piston rings, providing everything needed for a rebuild or upgrade.