Manley Performance

Manley 04+ Subaru WRX STi (EJ257) STD Stroke 99.5mm STD Bore 9.8:1 Dish Piston Set with Rings - 612100C-4

(No reviews yet) Write a Review
SKU:
MAN612100C-4
UPC:
807298103617
MPN:
612100C-4
Availability:
Regularly stocked product
  • Photo - Primary
  • Photo - Primary
  • User 2
  • User 1
  • User 7
  • User 8
  • User 4
  • User 6
  • Photo - out of package
  • User 5
  • User 3
MSRP: $760.03
$699.23
— You save $60.80
Frequently bought together:

Description

What makes these pistons suitable for high-performance applications?
Manley Piston Sets utilize 2618 alloy forgings, delivering extreme durability and strength for sustained high-performance driving under extreme stress.

Can I install these pistons myself?
Professional installation is recommended for these Piston Sets - Forged - 4cyl to ensure optimal performance and reliable engine operation.

Manley Piston Sets - 4 Cyl, engineered with 2618 alloy forgings for ultimate strength and reliability, are best suited for track and drag racing applications scoring 9/9. Featuring proven cam and barrel skirt profiles and tool steel wrist pins, these forged pistons deliver extreme durability and smoother engine operation. Experience enhanced piston strength for aggressive engine builds with Manley Performance forged pistons.

What Owners Say

Owners and enthusiasts consistently praise Manley pistons as top-tier 2618 forgings that many builders prefer for serious engine work. The pistons are valued for not scoring cylinder walls and for their improved designs, with newer versions addressing earlier weight concerns. Users report significant weight savings over OEM components—up to 46 grams per piston and rod assembly in some builds. The main criticism centers on the included piston rings, which some builders find inadequate and prone to premature softening and oil consumption issues. Despite this rings concern, Manley maintains a strong reputation among the performance community as a preferred choice alongside CP and Wiseco for high-quality engine 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 for sustained high-performance driving.

Achieves smoother engine operation and reduced friction for optimal power.

Provides enhanced piston strength to withstand aggressive engine builds.

Transforms your Subaru's engine for uncompromising track-day readiness.

Who Is This For?

Track / Autocross — 9/10
2618 alloy forgings for extreme stress reliability.

Drag Racing — 9/10
2618 alloy forgings for ultimate strength.

Racing Competition — 9/10
Engineered for ultimate strength and reliability.

Street Performance — 8/10
Proven cam and barrel skirt profiles enhance performance.

Engine Performance — 8/10
Forged construction supports high-stress engine operation.

Frequently Asked Questions

Are these Manley Piston Sets compatible with my 2004-2012 Subaru Impreza?

These Manley Piston Sets are designed to fit your 2004-2012 Subaru Impreza. Confirming the specific vehicle application with a qualified technician ensures precise fitment. These pistons deliver uncompromising engine readiness for your Subaru.

What level of expertise is required for installing these 4-cylinder pistons?

Professional installation is recommended for these 4-cylinder pistons. Consulting with a qualified technician is crucial for proper setup. This ensures the advanced mechanical requirements are met for optimal performance.

How do these forged pistons perform in extreme motorsport scenarios?

These pistons achieve a score of 9 for Track / Autocross usage, demonstrating extreme stress reliability. Engineered with 2618 alloy forgings, they provide ultimate strength for demanding competition. Transform your Subaru's engine for uncompromising track-day readiness.

Is upgrading to these forged pistons from stock beneficial for my engine?

Upgrading to these forged pistons is highly beneficial, as their 2618 alloy construction provides enhanced strength over stock components. This superior material supports high-stress engine operation, delivering improved durability. Experience an engine built for uncompromising performance.

What advanced materials are used in these Manley Performance pistons?

These pistons utilize 2618 alloy forgings and feature tool steel or chrome moly wrist pins for superior strength. Select part numbers also include moly skirt coatings for reduced friction. This advanced material selection ensures extreme durability for sustained high-performance driving.

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.

View AllClose

Additional Information

CARB:
This product is not CARB Legal and not for sale in California
Clearance Item:
N
MPN:
612100C-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:
8/10
View AllClose

Related Products

Related Products