Manley 03-06 EVO VIII/IX 85.5mm Bore-+.5mm Over Size-8.5/9.0 CR Dish Piston Set with Rings

Manley pistons are machined from high-strength 2618 material, designed to be lightweight yet durable for long service life. They feature an offset wrist pin design for quiet start-ups and utilize a 'one fixturing' manufacturing method to ensure perfect ring groove to skirt squareness, maximizing horsepower. All pistons come with moly-coated skirts. Each kit includes round wire locks, premium chrome moly wrist pins, and premium steel top ring sets from Total Seal. Upgraded 9310 alloy wrist pins are also available.

Turbo Tuff Design (4G63 / 4G64):
* 2618 high strength material
* 2.250 x .250" wall 9310 alloy pin included (P/N 42552)
* Pressure balance groove
* Will accommodate +1mm valve sizes
* Vertical Gas Ports designed for high HP Race Engines
* Premium Steel top rings with Napier seconds and round wire locks included
* Recommended piston clearance: .0035" measured 1.100" from the bottom of the oil ring

Common Features:
* Crown Thickness: .320"
* Top Ring: 1.2mm, .350" down
* Second Ring: 1.2mm
* Oil Ring: 2.8mm
* Valve Notches: .205" Int., 205" Exh.
* Pin Included: 9310 Alloy P/N 42552, .250" wall, 139 grams, 2.250" long, 22mm dia.
* Round Wire Locks: P/N 42270