We use cookies to make your experience better. To comply with the new e-Privacy directive, we need to ask for your consent to set the cookies. Learn more.
JE Pistons Billet FSR Piston Set (EJ25)
JE Pistons is proud to release the first billet racing pistons for Subaru EJ257 engines! Originally created for the Crawford Performance Unlimited AWD Time Attack Subaru and Ken Block's Gymkhana racecar, these pistons are now available to the public. The new pistons are 100% CNC machined from high quality 2618-T6 wrought aluminum bar stock and are specifically designed for high horsepower road and drag race engines. The pistons feature internal and external bracing for improved durability and strength.
A unique "donut dish" crown and application-specific under crown profile properly redistributes heat and reduces stress concentrations experienced in high horsepower Subaru engines. Unlike forged pistons, the billet pistons are machined on every surface allowing for all unnecessary weight to be removed during manufacturing. The result of this new process is a weight reduction of up to 32 grams compared to other piston designs! High quality 9310 steel wrist pins and JE Pro Seal Rings are included. For severe racing applications, upgraded Diamond Like Carbon (DLC) coated wrist pins are available.
FEATURES
- 100% CNC machined billet piston
- Specifically designed for high horsepower Subaru racing engines up to 1200hp
- Only 392 grams! Up to 32 grams lighter than other aftermarket pistons
- Manufactured from high quality, certified 2618-T6 aluminum alloy
- Internal and external strut braces
- Premium 9310 steel wrist pins included (.905 x 2.250"), DLC upgrade available
- JE Pro Seal Piston Rings Included (1.2, 1.2, 2.5mm)
- Tru Arc locks for easy installation
| PART# | BORE | OVERSIZE | STROKE (MM) | ROD (MM) | C/D (MM) | HEAD CC | C/R WITH 0.40 | DOME CC | GRAM |
|---|---|---|---|---|---|---|---|---|---|
| 310927 | 99.50 | 233 | 79 | 130.5mm | 30.7 | 57 | 8.8:1 | -14.1 | 390 |
| 286463 | 100.0 | 233 | 79 | 130.5mm | 30.7 | 57 | 8.8:1 | -15.1 | 393 |
As low as
$1,493.30
Only %1 left
SKU
JE Pistons Billet FSR Piston Set (EJ25)
With over 70 years of experience, JE Pistons is the leader in high performance forged pistons. We've built a reputation that the competition can only follow. JE has a history of manufacturing the highest quality pistons and components that professional engine builders, race teams, and high performance enthusiasts trust and rely on.
| Model | Fitment Confirmation |
|---|---|
| EJ255 | ✓ |
| EJ257 | ✓ |
WARNING: Operating, servicing and maintaining a passenger vehicle or off-road vehicle can expose you to chemicals including engine exhaust, carbon monoxide, phthalates, and lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. To minimize exposure, avoid breathing exhaust, do not idle the engine except as necessary, service your vehicle in a well-ventilated area and wear gloves or wash your hands frequently when servicing your vehicle. For more information go to https://www.P65Warnings.ca.gov/passenger-vehicle.
| SKU | JE Pistons Billet FSR Piston Set (EJ25) |
|---|---|
| Brand | JE Pistons |
| Product Type | Engine |
| Engine | Engine Internals |