Mahle 41788.020 Engine Piston Ring Set

Engine Piston Ring Set Overview

MAHLE piston ring set 41788.020 is a premium oversize ring set for 3.5709-inch bore applications. It uses carbon steel top and second rings, a stainless steel oil ring assembly, and a plasma-moly face coating to support low friction and controlled oil use.

Key Features

• Part number 41788.020 for oversize 0.020 in applications
• 3.5709-inch bore diameter
• Carbon steel top ring and second ring construction
• Stainless steel oil ring assembly
• Plasma-moly piston ring face coating
• Shallow groove design
• Premium item grade

Detailed Description

MAHLE 41788.020 is an engine piston ring set built for Ford Super Duty and related Ford chassis applications that require a 0.020-inch oversize fitment. The ring package combines carbon steel compression rings with a stainless steel oil ring assembly and a plasma-moly face coating to reduce friction and support oil control under demanding service conditions. The shallow groove design and listed axial heights help match the intended piston configuration. This part cross-references Hastings Piston Rings (e.g., 2M4814.020) for the same application.

Compatible With Ford E-350 Super Duty, Ford E-450 Super Duty, Ford F-450 Super Duty, Ford F-53 Motorhome Chassis, Ford F-550 Super Duty, Ford F-59 Commercial Stripped Chassis, Ford F-650, Ford F-750, Ford F-250 Super Duty, Ford F-350 Super Duty, Ford E-350 Club Wagon, Ford Excursion, Ford E-550 Super Duty, Ford E-350 Econoline Club Wagon, Ford E-450 Econoline Super Duty, Ford E-550 Econoline Super Duty, Ford Econoline Super Duty, and Ford E-350 Econoline.

Common Issues This Part Addresses

• Excessive oil consumption from worn piston rings
• Loss of cylinder sealing and compression
• Increased friction from aged ring surfaces
• Ring wear in oversize rebuild applications
• Reduced service life from degraded ring materials

Installation Notes and Tips

Verify bore diameter, oversize specification, and groove dimensions before installation. Match the ring set to the piston design and confirm the engine’s required 0.020-inch oversize service size. Clean ring grooves thoroughly and follow the engine builder’s ring end-gap and break-in procedures.

Quality Assurance

MAHLE develops piston rings to OE requirements and focuses on friction reduction, oil control, and service life. Part number 41788.020 reflects a premium-grade ring set engineered for consistent engine rebuild results.