Manley Performance Manley 98+ Subaru WRX (EJ205) 79mm +4mm Stroker 93mm +1mm Bore 8.5:1 Dish Piston Set with Rings

Fits 1998 and newer Subaru WRX with EJ205 engine

Part #: 620010C-4

Overview

The Manley Platinum Series piston set is designed for high-performance Subaru WRX engines, specifically those with the EJ205 platform. Crafted from premium 2618 alloy forgings, these pistons are engineered to withstand the rigors of increased displacement and boost, making them ideal for enthusiasts and professional tuners seeking durability and reliable power gains. The set features a 79mm stroke with a +4mm crankshaft stroke and a 93mm bore with a +1mm oversize, providing a substantial increase in displacement while maintaining optimal compression ratios. Whether you're building a high-horsepower street car or a dedicated race engine, these pistons help support your performance goals with their proven design and construction. Match the pistons' advanced materials and precise engineering with your engine build to achieve enhanced response, improved durability, and consistent performance under demanding conditions. The moly skirt coatings reduce friction and wear, extending the lifespan of your engine components, while the tool steel wrist pins ensure secure, reliable operation. The dish design supports a compression ratio of 8.5:1, balancing power output with engine efficiency.

Key Features

Designed with high-strength 2618 alloy forgings for superior durability and heat resistance. Precision-machined to exact specifications for optimal fit and performance. Moly-coated skirts reduce friction and wear during operation. Includes tool steel wrist pins for enhanced strength and reliability. Optimized dish design supports a compression ratio of 8.5:1, suitable for boosted applications. Engineered for high-performance Subaru WRX engines, supporting increased displacement and power. Manufactured to meet or exceed OEM standards for quality and consistency. Ideal for engine builders aiming to increase engine capacity and reliability.

Construction & Design

These pistons feature a robust forging process using 2618 aluminum alloy, known for its excellent strength-to-weight ratio and thermal properties. The moly skirt coatings provide a low-friction surface, reducing wear and improving efficiency. The precise machining ensures a perfect fit within the bore, supporting optimal combustion and power delivery.

Driving Feel & Feedback

Built to support high-performance builds, these pistons help deliver a responsive throttle feel and consistent power output. Their durable construction ensures reliable operation under high-stress conditions, contributing to a confident driving experience.

Installation & Fitment

Designed for straightforward installation in compatible EJ205 engines, these pistons require standard engine assembly procedures. Proper clearance and assembly are essential for optimal performance and longevity.

What’s Included

Complete piston set with rings and wrist pins included, ready for installation in your Subaru WRX engine.