Authorized Brand Dealer
Fulfillment From Multiple U.S. Warehouses
Enthusiast Owned & Supported
Easy Financing Available!
Authorized Brand Dealer
Fulfillment From Multiple U.S. Warehouses
Enthusiast Owned & Supported
Easy Financing Available!
Authorized Brand Dealer
Fulfillment From Multiple U.S. Warehouses
Enthusiast Owned & Supported
Easy Financing Available!
Authorized Brand Dealer
Fulfillment From Multiple U.S. Warehouses
Enthusiast Owned & Supported
Easy Financing Available!
Authorized Brand Dealer
Fulfillment From Multiple U.S. Warehouses
Enthusiast Owned & Supported
Easy Financing Available!
Authorized Brand Dealer
Fulfillment From Multiple U.S. Warehouses
Enthusiast Owned & Supported
Easy Financing Available!
Your cart
-
0-9
-
A
-
B
-
R
-
S
Manley Performance
Manley Platinum Series 99.75mm +.25mm Bore 9.8:1 Piston Set with Rings for 2004-2012 Subaru Impreza WRX STI (EJ257)
This product will be available for sale in 2 weeks, but you can pre-order now to receive 10% discount!
Fits 2004-2012 Subaru Impreza WRX STI models with the EJ257 engine (including Limited and Special Edition).
The Manley Platinum Series piston set is engineered for high-performance engine builds where reliability and ring seal are critical. Forged from domestic 2618 aluminum alloy, these pistons utilize a specialized manufacturing process where skirt turning and ring groove machining are performed in a single operation. This ensures absolute squareness between the groove and the skirt, resulting in superior ring sealing and consistent power delivery. Each piston features a proven cam and barrel skirt profile designed to reduce friction while maintaining stability within the cylinder bore.
- Engine Series: Subaru EJ257
- Bore Diameter: 99.75mm (+.25mm overbore)
- Compression Ratio: 9.8:1
- Stroke: Standard
- Material: 2618 Forged Aluminum Alloy
- Wrist Pins: Premium Chrome Moly
- Coating: Moly Skirt Coating
- Manufacturer Part Number: 612102C-4
Each set includes matching piston rings and high-strength wrist pins to ensure a complete, precision-matched installation for your EJ257 build.
🔧 Fitment & Compatibility
| 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 |
Choose your Location
-
Atlus
1340 Cobb Dr, Unit 1, Eustis, FL 32736
352-234-4458
Mon – Fri: 8:30 am – 4:30 pm
Sat: 9:00 am – 2:00 pm
Sun: Closed
Product Comparison
How they are Different
|
__ __ |
|
|---|---|
| Description |
Description - __ |
| Rating |
Rating - __ |
| Vendor |
Vendor - __ |
| Color |
Color - __ |
|
|
Compare products ( / )
The Atlus Price Guarantee
If you can find the part for a lower price from an authorized dealer/shop, we'll match the price! Reach out to Hello@AtlusAuto.com, our live chat located at the bottom right of your screen, or request an Atlas Price Guarantee, or visit our dedicated APG page to submit a request.
Manley Platinum Series 99.75mm +.25mm Bore 9.8:1 Piston Set with Rings for 2004-2012 Subaru Impreza WRX STI (EJ257)
This product will be available soon, but you can pre-order now to get on the list before others!
US Based Support - In Florida
30 Days Satisfaction Guarantee
Price Match
Our prices are updated daily to ensure we can offer you the best possible price. In the unlikely case that you have found a lower price, please contact us at hello@atlusauto.com and we'll do our best to answer your query right away!
Easy Financing
We've partnered up with Affirm/Shop!
Why use Affirm/Shop?
- Clear application process
- Friendly support team
- Spread a big payment interest-free
- Ability to buy what you want
How does it work?
- Add your purchase to cart
- Select Shop Payments at checkout
- Complete the application
- Compare any available finance options
Share:
Fits 2004-2012 Subaru Impreza WRX STI models with the EJ257 engine (including Limited and Special Edition).
The Manley Platinum Series piston set is engineered for high-performance engine builds where reliability and ring seal are critical. Forged from domestic 2618 aluminum alloy, these pistons utilize a specialized manufacturing process where skirt turning and ring groove machining are performed in a single operation. This ensures absolute squareness between the groove and the skirt, resulting in superior ring sealing and consistent power delivery. Each piston features a proven cam and barrel skirt profile designed to reduce friction while maintaining stability within the cylinder bore.
- Engine Series: Subaru EJ257
- Bore Diameter: 99.75mm (+.25mm overbore)
- Compression Ratio: 9.8:1
- Stroke: Standard
- Material: 2618 Forged Aluminum Alloy
- Wrist Pins: Premium Chrome Moly
- Coating: Moly Skirt Coating
- Manufacturer Part Number: 612102C-4
Each set includes matching piston rings and high-strength wrist pins to ensure a complete, precision-matched installation for your EJ257 build.
🔧 Fitment & Compatibility
| 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 |
Authencity Guaranteed
We only sell authentic products from verified brand partners and retail partners globally.
Can’t Find the Part You Need?
Our catalog represents only a portion of the automotive products available through our supplier network. If you cannot find a specific part, brand, or application on our website, submit a request below, and our team will help source it for you.
Please include as much information as possible, such as your vehicle's year, make, model, trim, engine, desired brand, or part number, to help us quickly identify the correct product.
- Choosing a selection results in a full page refresh.
- Opens in a new window.
