Manley 632200CB-1 Forged Turbo Piston for Subaru EJ257 99.50mm STD Bore

Vehicle Fitment

• 2004-2021 Subaru WRX STI (EJ257 2.5L turbo Boxer engine)
• 2006-2014 Subaru WRX (EJ255/EJ257 2.5L turbo Boxer engine)

Features

• Platinum Series forged piston engineered for performance and durability
• High-strength 2618 aluminum alloy forging for excellent fatigue resistance
• 99.50 mm STD bore size - Grade B fitment for EJ257 blocks
• Turbo-optimized piston profile for boosted applications
• Moly-coated skirts to reduce friction and wear
• Offset wrist pin design to improve cold start behavior and reduce noise
• Pressure-balance groove design for improved lubrication at high RPM
• Premium chrome moly wrist pin and round wire locks included

Specifications

• Part Number: Manley 632200CB-1
• Bore Size: 99.50 mm STD (Grade B)
• Compression Height: ~1.209" (30.7 mm)
• Piston Weight: ~410 g (each)
• Piston Type: Turbo-optimized forged piston
• Recommended Rod Length Compatibility: 5.137"
• Stroke: 79 mm (EJ25 platform)
• Wrist Pin Size: .9055" (23 mm)

Included Components

• 1x Platinum Series forged turbo piston
• 1x Premium top ring set
• 1x Chrome moly wrist pin
• 1x Set of round wire locks

Product Description

The Manley 632200CB-1 Forged Turbo Piston is designed for Subaru EJ257 and EJ255 turbocharged engines found in WRX STI and WRX models with a 99.50 mm STD bore (Grade B). Machined from premium 2618 aluminum alloy and forged for strength, this piston offers exceptional durability in boosted and high-RPM applications. Moly-coated skirts reduce friction, while the offset wrist pin design improves cold-start performance and reduces noise. The pressure-balance groove helps maintain lubrication integrity under demanding conditions.

Each piston includes a premium steel top ring set, a chrome moly wrist pin, and round wire locks for complete single-piston assembly. Built for high-performance builds and rebuilds of Subaru EJ-series engines, this forged turbo piston provides strength and reliability for boosted street, track, or competition use. Note: Sold individually - order the correct number based on engine configuration and bore grade measurements.