SUBARU 2.5L EJ25 Diamond Series Pistons


  • • Pistons made from 2618 material for High HP/Boost applications
  • • Premium 8620 series pins from 1018 mild steel
  • • 3D milling on piston crowns for ready to install finish
  • • Side Gas ports for better ring seal
  • • Pro-Select Total Seal 1.00mm x 1.20mm x 2.00mm ring set included
  • • Round Style Skirt
  • • Offset pins for quiet operation
  • • Over size valve pockets for larger than stock valves
  • • Deeper Valve pockets to accept high lift camshafts
  • • Molly Skirt coating for friction loss and skirt wear protection
  • * The head dome of US STi is 57.0cc’s