JE Pistons Billet FSR Piston Set (EJ25)

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
SKU
JE EJ257 FSR
$1,221.10

 

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.

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 .040 Dome CC Gram
310927 99.50 STD 79 130.5 30.7 57 8.8:1 -14.1 390
286463 100.00 0.5 79 130.5 30.7 57 8.8:1 -15.1 392

 

 

Fitment

  • EJ25

warning_symbolWARNING: 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.

More Information
SKU JE EJ257 FSR
Product Type Engine
Engine Engine Internals
Brand JE Pistons
Need Help with this product?

Chat with our staff using our Live Chat, Call us at 303.402.5142 or Email us at

flatironstuning@flatironsimports.com
Fast Shipping

Products ship within 2 days.

Easy Returns

Friendly return policy because our priority is making sure you have the right product.

Safe and Secure Shopping
click here