Manley Performance

Manley 04+ Subaru WRX STi (EJ257) STD Stroke 99.5mm STD Bore 8.5:1 Dish Piston Set with Rings - 612000C-4

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SKU:
MAN612000C-4
UPC:
807298042091
MPN:
612000C-4
Availability:
Regularly stocked product
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MSRP: $760.03
$699.23
— You save $60.80
Current Stock: 10

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Description

What is the primary benefit of using Manley forged pistons for a 2004-2012 Subaru Impreza?
Manley forged pistons deliver extreme durability and resistance to detonation, crucial for high-boost applications in your 2004-2012 Subaru Impreza.

Are Manley forged pistons easy to install on a 2004-2012 Subaru Impreza?
Professional installation is recommended for Manley forged pistons to ensure optimal performance and reliability for your 2004-2012 Subaru Impreza.

MAN Piston Sets - 4 Cyl for your 2004-2012 Subaru Impreza are engineered with 2618 alloy forgings for unmatched strength and reliability under extreme conditions, achieving a score of 9 for Engine Performance. Featuring proven cam and barrel skirt profiles with tool steel wrist pins, these pistons provide superior strength and reliability for demanding track or street use with absolute confidence.

What Owners Say

Owners and enthusiasts consistently praise Manley pistons as top-tier 2618 forgings that many builders prefer for serious engine builds. The pistons earn recognition for their design quality and for not scoring cylinder walls, a significant advantage during high-performance use. Recent versions have addressed earlier complaints about excessive weight, with builders noting impressive weight reductions compared to OEM components—some reporting assemblies running 46 grams lighter per piston. The main criticism centers on the included piston rings, which enthusiasts report can lose sealing effectiveness and contribute to premature oil consumption. Despite this limitation, Manley pistons maintain a strong reputation among the performance community as a reliable choice for demanding builds.

Key Features

  • 2618 alloy forgings
  • proven cam and barrel skirt profiles
  • tool steel wrist pins
  • moly skirt coatings on select part numbers
  • Chrome Moly Wrist Pins
  • 2618 alloy forgings

Why Choose the MAN Piston Sets - 4 Cyl

Delivers extreme durability and resistance to detonation under high boost.

Achieves smoother engine operation and reduced friction for optimal power.

Provides superior strength and reliability for demanding track or street use.

Transforms your Subaru's engine for exhilarating acceleration and sustained performance.

Who Is This For?

Track / Autocross — 9/10
2618 alloy forgings offer extreme strength for racing.

Drag Racing — 9/10
Forged 2618 alloy withstands high stress and power.

Racing Competition — 9/10
Engineered for unmatched strength under extreme conditions.

Street Performance — 8/10
Proven profiles and strong forgings enhance performance.

Engine Performance — 9/10
2618 alloy forgings provide unmatched strength.

Additional Resources

Official Manley Performance Product Page

Important Notices

⚠️ CARB Notice: This product is NOT legal for street use in California under CARB (California Air Resources Board) regulations. For off-road or race use only.

⚠️ Proposition 65 Warning: This product can expose you to chemicals including lead and/or other substances known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.

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Additional Information

CARB:
This product is not CARB Legal and not for sale in California
Clearance Item:
N
MPN:
612000C-4
Proposition 65:
Y
Case Lot Quantity:
1
Category:
Engine Components>Piston Sets - Forged - 4cyl
Product Level:
Premium Performance
Track / Autocross:
9/10
Drag Racing:
9/10
Racing Competition:
9/10
Street Performance:
8/10
Engine Performance:
9/10
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