Victor 40564CP.030 Plasma-Moly Piston Ring Set Bore - 4.030 8-Cylinder

The Victor 40564CP.030 is a premium plasma-moly piston ring set designed for 8-cylinder engines with a 4.030-inch (+.030" oversize) bore. This drop-in ready ring set delivers OE-quality sealing and durability for engine rebuilds on a wide range of classic American V8 applications.

Key Features:

• Plasma-moly top compression ring — cast iron construction with a plasma-moly facing for superior wear resistance and reduced friction
• Barrel-faced compression ring contact area for more efficient sealing and improved compression retention
• CNC-controlled gap chamfer on compression rings to optimize compression and minimize blow-by
• Reverse twist intermediate ring — taper face design enhances groove side sealing and cylinder wall contact
• 3-piece oil control ring assembly — stainless steel expander with standard tension for excellent conformability within the bore
• Drop-in installation — standard pre-set gaps mean no file fitting required; rings are pre-lapped to seat immediately, virtually eliminating break-in time
• Sold as a complete 8-cylinder set (8 sets of rings)

Specifications:

• Bore Size: 4.030 in. (102.362 mm) — +.030" oversize
• Top Ring Thickness: 5/64 in. | Material: Cast Iron | Facing: Plasma-Moly
• Second Ring Thickness: 5/64 in. | Design: Reverse Twist Taper Face
• Oil Ring Thickness: 3/16 in. | Tension: Standard
• Oil Ring Material: Stainless Steel Expander
• Quantity: Complete set for 8-cylinder engine
• File Fit: No | Gapless: No | Gas Ported: No

The Victor 40564CP.030 piston ring set is an ideal choice for engine rebuilds requiring a reliable, installer-friendly solution with proven OE-grade materials and construction. Also sold under the MAHLE Original and Clevite part number 40564CP.030.