Manley Pistoni BMW N55/S55

2618 high strength material

Offset wrist pin for quiet start-ups

.210” wall Premium Chrome Moly pin (Standard Series) included P/N 42451 9310 alloy .210” wall pin (Extreme Duty Series) included P/N 42551

Pressure balance groove

Will accommodate +1mm valve sizes Premium Steel top rings with Napier seconds and round wire locks included

Recommended piston clearance .0035” measured .850” from the bottom of the oil ring