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Manley Performance Manley 04+ Subaru WRX STi (EJ257) STD Stroke 99.5mm STD Bore 8.5:1 Dish Piston Set with Rings
Manley Performance Manley 04+ Subaru WRX STi (EJ257) STD Stroke 99.5mm STD Bore 8.5:1 Dish Piston Set with Rings
Manley Performance Manley 04+ Subaru WRX STi (EJ257) STD Stroke 99.5mm STD Bore 8.5:1 Dish Piston Set with Rings
Manley Performance Manley 04+ Subaru WRX STi (EJ257) STD Stroke 99.5mm STD Bore 8.5:1 Dish Piston Set with Rings
Manley Performance Manley 04+ Subaru WRX STi (EJ257) STD Stroke 99.5mm STD Bore 8.5:1 Dish Piston Set with Rings
Manley Performance Manley 04+ Subaru WRX STi (EJ257) STD Stroke 99.5mm STD Bore 8.5:1 Dish Piston Set with Rings
Manley Performance Manley 04+ Subaru WRX STi (EJ257) STD Stroke 99.5mm STD Bore 8.5:1 Dish Piston Set with Rings
Manley Performance Manley 04+ Subaru WRX STi (EJ257) STD Stroke 99.5mm STD Bore 8.5:1 Dish Piston Set with Rings
Manley Performance Manley 04+ Subaru WRX STi (EJ257) STD Stroke 99.5mm STD Bore 8.5:1 Dish Piston Set with Rings
Manley Performance Manley 04+ Subaru WRX STi (EJ257) STD Stroke 99.5mm STD Bore 8.5:1 Dish Piston Set with Rings
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Manley 04+ Subaru WRX STi (EJ257) STD Stroke 99.5mm STD Bore 8.5:1 Dish Piston Set with Rings

MAN612000C-4
807298042091
Piston Sets - Forged - 4cyl
19 Units In Stock - Ships Next Business Day
$ 805.63 $ 741.18
$ 741.18

SKU: 612000C-4 | UPC: 807298042091

Manley 2004-2021 Subaru WRX STI EJ257 STD Stroke 99.5mm STD Bore 8.5:1 Dish Piston Set with Rings

Upgrade your Subaru WRX STI EJ257 engine with Manley Platinum Series forged pistons designed for 2004-2021 models including Impreza WRX STI, Limited, and Special Edition variants. These pistons deliver reliable power handling in turbocharged applications with precise fit and long-lasting construction. Engine builders choose them for demanding street and track use thanks to advanced alloy and coatings that withstand high boost levels.

Key Features

  • 2618 T6 Aluminum Alloy: High-silicon forged construction resists detonation and provides structural integrity under extreme cylinder pressures
  • Proven Skirt Profiles: Optimized cam and barrel shapes with moly coating minimize friction, wear, and noise while improving ring seal
  • Tool Steel Wrist Pins: .945" diameter chromoly pins with wire locks ensure secure connection to rods during high-rpm operation
  • Accu-Groove Design: Ring groove configuration supports low-tension rings for reduced blow-by and better power output
  • Included Ring Set: Premium 1.2mm/1.5mm/2.8mm rings with moly top ring pre-gapped for quick assembly and consistent performance

Product Notes

  • Rings arrive pre-gapped. always verify and adjust gaps per engine builder specifications before installation
  • Compression height 30mm suits stock-length rods. confirm rod and stroke compatibility
  • Packaged to prevent damage. inspect upon receipt for any shipping issues

Installation Notes

  • Professional installation recommended.
  • Bores must measure true to 99.5mm std. hone if needed for optimal clearance of 0.0035-0.0045 inch
  • Compatible with stock or aftermarket H-beam rods. use high-quality assembly lube on skirts and pins

This Part Fits

Year Make Model Submodel
2004-2012 Subaru Impreza WRX STI
2007,2011-2012 Subaru Impreza WRX STI Limited
2010 Subaru Impreza WRX STI Special Edition
2013-2014 Subaru Impreza WRX STI
2015-2021 Subaru WRX STI

Why Choose Manley?

  • Professional engine builders and tuners depend on Manley for consistent results in competition engines
  • Race-proven designs handle 500+ whp reliably with proper tuning
  • Precision CNC machining ensures exact tolerances for drop-in performance

Frequently Asked Questions

  • Q: Will these pistons fit 2015-2021 Subaru WRX STI models?
    A: Yes, they match the EJ257 engine block in all 2004-2021 STI variants with 99.5mm std bore and 79mm stroke
  • Q: What alloy and coatings are used?
    A: Forged from 2618 T6 aluminum with moly skirt coating and phosphate wrist pins for heat resistance and low friction
  • Q: What is the warranty and return policy?
    A: Backed by Manley limited warranty against manufacturing defects. contact for details, no returns on opened sets

Shipping & Handling

  • Method: UPS Ground or USPS Priority
  • Availability: In stock - ships same or next business day
  • Packaging: Secure foam-lined box measuring 12 x 12 x 6 inches
  • Weight: 6.35 lbs

Request For Information

Have questions about Manley 04+ Subaru WRX STi (EJ257) STD Stroke 99.5mm STD Bore 8.5:1 Dish Piston Set with Rings? Fill out the form below and we'll get back to you by the next business day.
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