Manley 86.5mm +.5mm Bore 10:1 Dish Pistons + Rings - Subaru WRX 2015-2021

-2618 high strength material; Lightweight design

-.150" x 2.250" wall Premium Chrome Moly pin (Standard Series) included P/N 42251

-9310 alloy .210" wall pin (Extreme Duty Series) included P/N 42551

-Pressure balance groove

-Will accommodate +1mm valve sizes

-Premium Steel top ring sets and round wire locks included

-Recommended piston clearance: .003" for mildly boosted and .0035"

for highly boosted measured .850" from the bottom of the oil ring

Manley recommends piston clearance of .003" for mildly boosted and .0035" for highly boosted applications, measured 1.100"from the bottom of the oil ring.