J.E. Pistons FSR Pro Series 2 Ring Piston Kit - Standard Bore 77.00mm, 13.5:1 Compression - 323556

Smooth radius dome and dish designs
Radiused valve reliefs
Precision CNC machined ring grooves
Machined oil drain back holes engineered for specific oil control
Factory honed pin bores, wrist pins and locks
Pro Series features reduced weight and dedicated forgings