JE Pistons 312415 forged pistons Ford Focus ST 2.5 20v 83.50 mm CR 8.5:1

For: Ford Focus RS Mk2, Focus ST 2.5L, Volvo S60R with 2.5 20v 5cyl. B5254, B5252 engines

Dome/Dish requires no deburring or preparation
NEW ASYMMETRICAL FSR forging! State of the art asymmetrical skirt technology reduces friction and mass while providing a more rigid and durable platform (Skirt Style F).
2618 T6 high tensile forged aluminum 
JE designs are specifically engineered for extreme applications up to, and including, professional competition. In this environment, the higher compression ratios, highest boost or heavy nitrous usage necessitate the higher tensile strength 2618 aluminum alloy. 
FSR pistons include offset pins for quiet operation.
Dome and dishes feature smooth flowing radii for excellent flame travel. 
1.0 x 1.2 x 2.8mm rings included
Straight wall carbon steel wrist pin included. 
Pin fitting, wire locks, and rings included