Manley Performance
Manley 04+ Subaru WRX STi (EJ257) STD Stroke 99.75mm +.25mm Bore 8.5:1 Dish Piston Set with Rings - 612002C-4
- SKU:
- MAN612002C-4
- UPC:
- 807298026589
- MPN:
- 612002C-4
- Availability:
- Regularly stocked product
Description
Are these pistons compatible with my specific 4-cylinder engine?
Manley Piston Sets require fitment confirmation for your specific 4-cylinder engine to ensure a perfect and safe installation.
How difficult is the installation process for these pistons?
Engineered for a drop-in install, these pistons simplify the installation process for enhanced engine performance.
Manley 4 Cyl Piston Sets offer ultimate strength and reliability for demanding applications scoring a 9 in racing use. Constructed from high-performance 2618 alloy forgings and featuring proven cam and barrel skirt profiles, these pistons are built to withstand extreme conditions. Trust Manley for confidence in your engine's enhanced performance and durability.
What Owners Say
Owners and enthusiasts consistently praise Manley pistons as well-designed 2618 forgings that rank among the top choices for performance builds, alongside CP and Wiseco. The pistons earn specific recognition for not scoring cylinder walls and for improved weight reduction in newer versions, with builders noting assemblies running significantly lighter than OEM components—a meaningful advantage for balanced rotating assemblies. The main criticism centers on the included piston rings, which some builders report lose their sealing ability prematurely and contribute to oil consumption issues. Despite the ring concerns, Manley has demonstrated responsiveness to community feedback, and their pistons maintain a strong reputation as a preferred component among experienced engine builders.
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 for relentless track days and spirited driving.
Achieves smoother engine operation and reduced friction for enhanced power delivery.
Provides superior strength to withstand extreme boost pressures and high RPMs.
Transforms your Subaru's engine for uncompromising performance and longevity.
Who Is This For?
Track / Autocross — 9/10
2618 alloy forgings offer ultimate strength under extreme conditions.
Drag Racing — 9/10
2618 alloy forgings provide ultimate strength for high stress.
Racing Competition — 9/10
Engineered for ultimate strength and reliability under extreme conditions.
Street Performance — 8/10
Forged construction and proven profiles enhance performance.
Engine Performance — 9/10
2618 alloy forgings ensure ultimate strength and reliability.
Easy DIY Install — 7/10
Drop-in install type simplifies the installation process.
Frequently Asked Questions
What vehicle models are compatible with these Manley 4-cylinder forged pistons?
These Manley forged pistons are designed as a drop-in replacement for the 2004-2012 Subaru Impreza engine. This specific fitment ensures a precise installation for optimal performance. You can confidently upgrade your Subaru's engine with these engineered pistons.
How difficult is the installation process for these 4-cylinder forged pistons?
Installation of these Manley pistons is simplified due to their 'drop-in' install type, facilitating an easier build. This design approach helps streamline the engine assembly process. Expect a more manageable installation experience for your performance build.
What kind of performance enhancements can I expect from these 4-cylinder forged pistons for track use?
Achieve ultimate strength and reliability on track days with a usage score of 9 for 'Track / Autocross'. These pistons are engineered with 2618 alloy forgings for extreme durability. Transform your Subaru's engine for uncompromising track performance.
What materials are used in the construction of these Manley 4-cylinder forged pistons?
These pistons are constructed using robust 2618 alloy forgings for extreme durability and strength. They also feature tool steel or Chrome Moly wrist pins for added resilience under stress. Experience uncompromising engine performance and longevity with these high-quality components.
Additional Resources
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.
Additional Information
CARB: |
This product is not CARB Legal and not for sale in California |
Clearance Item: |
N |
MPN: |
612002C-4 |
Proposition 65: |
Y |
Case Lot Quantity: |
1 |
Category: |
Engine Components>Piston Sets - Forged - 4cyl |
Install Type: |
Drop-In |
Product Level: |
Premium Performance |
Track / Autocross: |
9/10 |
Drag Racing: |
9/10 |
Racing Competition: |
9/10 |
Street Performance: |
8/10 |
Engine Performance: |
9/10 |
Easy DIY Install: |
7/10 |
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