The Manley Platinum Series 86.25mm Piston Set for the 2015-20 Subaru WRX are CNC machined from lightweight 6818 high strength material and features pressure valve groove. This +.25mm oversize piston set includes chrome moly pins, ring pack and pin clips.

• Bore Size: 86.25mm
  Oversize: +.25mm
  Rod Length: 5.090″
  Stroke: 86mm
  Comp Distance: 1.292″
  Dome Volume: -13cc
  Comp Ratio: 10.0
  Piston Type: Dish
  Piston Weight: 350g
  2618 High Strength Material; Lightweight Design
  2.250″ x 150″ wall Premium Chrome Moly pin (Standard Series) included P/N 42251
  Pressure Balance Groove
  Will accommodate +1mm valve sizes
  Premium Steel tip rings with Napier seconds and round wire locks included