JE FSR Pistons EJ257 Block With EJ20 Heads 100mm Bore High Compression Subaru Turbo 2.5L

New high strength FSR forging design! JE Pistons new FSR forgings are both strong and lightweight! The new FSR design has undergone extensive on-track testing to ensure flawless performance under the most demanding conditions.

Piston Profile Matches EJ20 Combustion Chamber. No Cylinder Head Modifications Necessary.

Features:
-Dome/Dish requires no deburring or preparation
-2618 T6 high tensile forged aluminum
-Specifically engineered for high horsepower Subaru engines.
-Dome and dishes feature smooth flowing radii for excellent flame travel.
-1.2 x 1.2 x 2.5mm ring widths.
-.905 x 2.500 straight wall carbon steel wrist pin provided.
-Pin fitting and Tru Arc locks included
-Piston Profile Matches EJ20 Chamber Profile

Specifications:
Bore: 100mm
Stroke: 79mm
C/D: 30.7mm
Head CC's: 48
C/r With 0.40: 9.5:1
Dome CC's: -17.0
Grams: 416

Applications:
2002-2005 WRX