Manley Subaru 2.5L EJ257 WRX STI Piston Set – 100.00mm Bore, 1.130in CH, -26.00cc

Manley’s Turbo Tuff® Platinum Series pistons for the Subaru 2.5L EJ257 are engineered for high boost, high power, and maximum durability. Manufactured from premium 2618 alloy forgings and finished with Manley’s strict machining standards, these pistons deliver exceptional ring seal, strength, and reliability for both street and motorsport applications.

Key Features

• 2618 aluminium alloy forgings for superior strength under high cylinder pressure
• Chrome Moly wrist pins included as standard (upgradable to 9310 or DLC-coated options)
• Precision-machined ring lands and grooves for excellent ring seal and power retention
• Cam and barrel skirt profiles designed for strong performance with reduced cylinder wall wear
• Unique one-operation machining process ensuring ideal skirt and ring groove squareness
• Dish-style piston crown suited for high-boost turbocharged EJ builds

Specifications

• Bore Diameter: 100.00 mm (+0.50 mm oversize)
• Compression Height: 1.130 in
• Piston Volume: -26.00 cc (dish)
• Compression Ratio: Approx. 8.5:1
• Piston Weight: 396 g
• Piston Series: Turbo Tuff® Extreme Duty
• Quantity: Set of 4
• Engine Stroke: 83.00 mm

Vehicle Compatibility

• Subaru WRX STI EJ257 (2.5L)
• Suitable for EJ257 engine builds across various Subaru platforms

Images may be generic and used for reference only. Please review specifications before purchase.