J.E. Pistons FSR Piston Kit - Standard Bore 3.937in., 10.5:1 Compression - 324722

From Daytona to Bonneville, JE Pistons continues to set the standards in street bike piston design
JE has recorded wins at Daytona with American Hondas CBR600RR, low ETs on the drag strip and land speed records at Bonneville
Machined from 2618-T6 high tensile forged aluminum
Dome/ dish features smooth flowing radii; require no deburring or preparation
JE designs are specifically engineered for extreme applications including professional competition
Pins, pin fitment, lock and rings included
Made in the U.S.A.