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  • Manley Performance [04-12 Impreza WRX STI] EJ257 Platinum Series Piston Set with Rings - 8.5:1 Compression, 99.75mm Bore
  • Manley Performance [04-12 Impreza WRX STI] EJ257 Platinum Series Piston Set with Rings - 8.5:1 Compression, 99.75mm Bore
  • Manley Performance [04-12 Impreza WRX STI] EJ257 Platinum Series Piston Set with Rings - 8.5:1 Compression, 99.75mm Bore
  • Manley Performance [04-12 Impreza WRX STI] EJ257 Platinum Series Piston Set with Rings - 8.5:1 Compression, 99.75mm Bore
  • Manley Performance [04-12 Impreza WRX STI] EJ257 Platinum Series Piston Set with Rings - 8.5:1 Compression, 99.75mm Bore
  • Manley Performance [04-12 Impreza WRX STI] EJ257 Platinum Series Piston Set with Rings - 8.5:1 Compression, 99.75mm Bore
  • Manley Performance [04-12 Impreza WRX STI] EJ257 Platinum Series Piston Set with Rings - 8.5:1 Compression, 99.75mm Bore
  • Manley Performance [04-12 Impreza WRX STI] EJ257 Platinum Series Piston Set with Rings - 8.5:1 Compression, 99.75mm Bore
  • Manley Performance [04-12 Impreza WRX STI] EJ257 Platinum Series Piston Set with Rings - 8.5:1 Compression, 99.75mm Bore
  • Manley Performance [04-12 Impreza WRX STI] EJ257 Platinum Series Piston Set with Rings - 8.5:1 Compression, 99.75mm Bore

Manley Performance

Manley Performance

EJ257 Platinum Series Piston Set with Rings - 8.5:1 Compression, 99.75mm Bore

Fits: 04-12 Impreza WRX STI

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Auto Parts Store of the Year 2026

Manley Performance EJ257 Platinum Series Piston Set with Rings - 8.5:1 Compression, 99.75mm Bore
Fits: 04-12 Impreza WRX STI

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Fitment

Please Note: 2004-2012 Subaru Impreza WRX STI (EJ257) - Manley Performance Platinum Series Piston Set with Rings, 99.75mm bore (+.25mm over), 8.5:1 compression, standard stroke. Manley part number 612002C-4.
  • 2004–2014 Subaru | WRX STI

Description

Manley Performance Part Number MAN612002C-4 Platinum Series pistons are designed for 2004-2012 Subaru Impreza WRX STI models equipped with the EJ257 engine. This piston set features a standard-stroke configuration, 8.5:1 compression, a 99.75mm bore (+.25mm over), and includes piston rings for a complete installation solution.

Manley's Platinum Series pistons feature 2618 alloy forgings, proven cam and barrel skirt profiles, tool steel wrist pins, and moly skirt coatings on select part numbers. Manley's unique fixturing allows for skirt turning and ring groove machining in a single operation, ensuring ultimate ring groove to skirt squareness.

  • For 2004-2012 Subaru Impreza WRX STI (EJ257)
  • 99.75mm bore (+.25mm over); 8.5:1 compression
  • Standard-stroke 79mm configuration; 2618 alloy forgings
  • Cam and barrel skirt profiles; moly skirt coatings
  • Tool steel wrist pins; piston rings included
  • Manley part number 612002C-4

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