Part #: 317839
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).
2007-UP EVO X 4B11T - NEW ASYMMETRICAL FSR
*** NOTE *** Oil squirter modification needed for Asymmetrical FSR.
Squirter can be bent or locating pin removed for clearance. Please make sure to check Rod to Oil Squirter clearance when relocating oil squirter.
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