Part #: 297047
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).
MITSUBISHI 1999-2007 EVOLUTION VI - IX / 4G63 22MM PIN - NEW ASYMMETRICAL FSR
Crown requires no deburring or preparation
2618 T6 high tensile forged aluminum
In this environment, higher boost levels or heavy nitrous usage necessitate JE's wrought 2618 alloy.
FSR pistons include offset pins for quiet operation.
Dished pistons feature new Smooth Finished Crown process for excellent flame travel.
1.0 x 1.2 x 2.8mm ring widths
.866 x 2.250 straight wall carbon steel wrist pin provided. Round style pistons use 2.350 length pins.
Pin fitting, rings and wire locks included
Includes 4 pistons and 4 rings