Mahle S40564CP Engine Piston Ring Set

Mahle S40564CP Piston Ring Set

The Mahle S40564CP piston ring set is a premium engine piston ring set built for 4.000-inch bore applications. It combines a plasma-moly face coating with carbon steel, cast iron, and stainless steel ring materials to support controlled oil use, reduced friction, and long service life in compatible Ford, Chevrolet, GMC, Dodge, and other V8 applications.

Key Features

• Part number: S40564CP
• 4.000-inch bore diameter with standard oversize
• Plasma-moly piston ring face coating for wear resistance
• Top ring material: carbon steel
• Second ring material: cast iron
• Oil ring assembly material: stainless steel
• Premium item grade for engine rebuild use
• Engine piston ring set for cylinder block component service

Detailed Description

Mahle designs piston rings around OE requirements, focusing on lower friction, reduced ring mass, and oil control without sacrificing durability. The S40564CP uses a 0.0781-inch top ring and second ring thickness, plus a 0.1875-inch oil ring assembly thickness, giving rebuilders a precise specification set for standard 4.000-inch bore engines. The plasma-moly ring face coating adds a durable contact surface, while the mixed-material construction supports sealing and oil management in high-mileage or performance rebuilds. This part cross-references Sealed Power WE-251K for the same application. Common fitment includes Ford F-250, Ford F-350, Chevrolet Camaro, and GMC C/K truck applications listed below.

What It Helps Address

• Excessive oil consumption from worn or tired piston rings
• Loss of cylinder sealing that can affect compression
• Friction-related wear in rebuilt or refreshed engines
• Ring wear in standard-bore engine rebuilds
• Oil control issues in older V8 truck and car applications

Installation Notes and Tips

Verify bore size before installation; this set is specified for a 4.000-inch bore and standard size applications. Confirm ring end gap, groove clearance, and cylinder wall condition during engine assembly. Clean ring lands thoroughly and follow the engine builder’s measurement procedure before final installation. For fitment verification, use the vehicle listing exactly as shown: Fits 1977-1997 Ford F-250, N/A; Fits 1972-1974 Ford F-250, N/A; Fits 1972-1997 Ford F-350, N/A; Fits 1967-1981 Chevrolet Camaro, N/A; Fits 1987-1988 Chevrolet Camaro, N/A; Fits 1995-1996 Chevrolet Camaro, N/A; Fits 1979-1986 GMC C1500, N/A; Fits 1979-1986 GMC K1500, N/A; Fits 1987-1988 GMC R1500 Suburban, N/A; Fits 1987-1988 Pontiac Firebird, N/A.

Quality Assurance

Mahle positions this piston ring set as a technically advanced OE-focused component, engineered to reduce friction and ring mass while helping minimize engine oil consumption and extend service life. The S40564CP is a premium-grade choice for rebuilders seeking a precise piston ring set for compatible Ford F-250, Ford F-350, Chevrolet Camaro, GMC truck, and Pontiac Firebird applications.