Mahle 41107CP.040 Engine Piston Ring Set

Product Overview

MAHLE 41107CP.040 is a premium engine piston ring set built for 4.090-inch bore applications with a 0.040-inch oversize. It combines a plasma-moly face coating with ductile iron, cast iron, and stainless steel ring materials to support controlled oil use and reduced friction.

Compatible with Ford truck engine rebuilds, this ring set is specified for select 1974-1975 Ford F-100, F-150, F-250, F-350, F-500, and 1974 Ford M-450 applications. The 41107CP.040 part number is also useful when matching an OE-style replacement for the same engine family.

Key Features

• 4.090-inch bore diameter with 0.040-inch oversize sizing
• Plasma-moly piston ring face coating for wear resistance
• Ductile iron top ring, cast iron second ring, and stainless steel oil ring assembly
• Premium-grade construction for engine rebuild service
• Engineered to reduce friction and help control oil consumption

Detailed Description

MAHLE piston rings are developed around OE requirements and focus on the balance of friction control, ring mass, oil control, and service life. The 41107CP.040 uses a plasma-moly coated face and material-specific ring construction to match the demands of rebuild work where sealing performance and durability matter. For Ford F-100, F-150, F-250, F-350, F-500, and M-450 engine applications, this set provides the dimensional and material specification needed for a proper rebuild selection. The 41107CP.040 part number should be matched to bore size and oversize requirements before installation.

What It Helps Address

• Excessive oil consumption from worn ring sealing surfaces
• Loss of compression caused by ring wear or fatigue
• Increased friction from aged or damaged piston rings
• Rebuild mismatch when oversize ring dimensions are required
• Service-life concerns in engines needing premium ring materials

Installation Notes and Tips

Confirm bore diameter, oversize, and ring thickness before assembly. Verify ring end gap, cylinder condition, and piston groove dimensions during engine rebuild work. This piston ring set is intended for applications listed in the fitment data and should be installed according to the engine builder’s specifications.

Quality Assurance

MAHLE develops piston rings to OE-level engineering requirements and emphasizes reduced friction, lower oil consumption, and longer service life. The 41107CP.040 reflects that product approach with premium materials and a plasma-moly face coating.