MANLEY PLATINUM SERIES Extreme Duty Pistons, -8.5cc DISH (9.0:1) [Bore Size 3.662" | Rod Length 6.011" | Stroke 3.413" | Compression Distance 1.239" | Piston Wt/Gms 415] (FORD 3.5L EcoBoost)

2618 high strength material; Lightweight design
Offset wrist pin design for quiet start-ups
Perfect ring groove to skirt squareness
Pressure balance groove
Round wire locks
1.2, 1.2, 2.5mm ring package
Will accommodate +1mm valve sizes
2.500" x .180" wall Premium Chrome Moly pin (Standard Series) included
9310 alloy .210" wall pin (Extreme Duty Series) included P/N 42546

These pistons are designed for connecting rods with .9055"/23mm diameter floating wrist pins

The root diameter of the ring grooves accommodates Manley rings and others which have the following radial thickness Top: .134" 2nd: .143" Oil: .115"
Piston Clearance: .003" measured .850" from bottom of the oil ring