Manley 03-06 EVO VIII/IX 85.5mm +.5mm Oversize Bore 8.5:1 Dish Piston Set with Rings

Manley pistons are machined from high-strength 2618 material. They are designed to be lightweight yet robust for long service life. The offset wrist pin design ensures quiet start-ups. Perfect ring groove to skirt squareness is achieved through a unique "one fixturing" manufacturing method, assuring maximum horsepower. All pistons come with moly-coated skirts. Round wire locks, premium chrome moly wrist pins, and premium steel top ring sets from Total Seal are included. Upgraded 9310 alloy wrist pins are also available.

* **Forging:** 2618 alloy for maximum high temperature strength and fatigue resistance.
* **Attributes:**
* "Contour forgings" provide optimum balance between strength and weight with no grain-interrupting internal milling.
* Proprietary multi-step top ring groove machining process ensures optimum control of the groove's size, geometry, flatness, and finish.
* All final turning is performed in one fixturing, resulting in complete squareness of rings to the cylinder wall.
* Federal Form-Scan gauging validates ideal skirt indexing to pinhole and skirt-to-skirt polarity.
* Value-added features like a pressure balance groove are included in all series.
* Precise pinhole machining results in exact compression distance, precise lock ring groove spacing, size, and concentricity.
* **Kit Includes:** Pistons, rings, pins, and locks.