Mahle S41768.020 Engine Piston Ring Set

Overview

MAHLE S41768.020 is a premium engine piston ring set built for 4.130-inch bore applications with a 0.020-inch oversize. It uses a plasma-moly face coating and a mixed-material ring design to support low friction and controlled oil use in demanding Ford truck and van engines.

Compatible With Ford E-350, E-450, E-550, Excursion, F-250, F-350, F-450, F-550, and related Super Duty and Econoline applications listed below. Part number S41768.020 is also referenced by interchange numbers 1830951 and 1830951C92 for the same application.

Key Features

• Premium-grade piston ring set for engine rebuild service
• 4.130-inch bore diameter with 0.020-inch oversize
• Plasma-moly face coating for reduced friction at the ring face
• Ductile iron top ring with cast iron second and oil ring components
• 2-piece oil ring assembly with cast iron construction
• Engineered for direct-injection Ford applications

Detailed Description

MAHLE S41768.020 is an engine piston ring set for Ford gasoline engine rebuilds that require a 4.130-inch bore and 0.020-inch oversize sizing. The ring package combines a ductile iron top ring, cast iron second ring, and a 2-piece cast iron oil ring assembly to balance sealing, wear resistance, and oil control. The plasma-moly face coating adds a low-friction surface at the ring face, which is important in high-load service and repeated heat cycling.

This part fits 2003 Ford E-350 Club Wagon, 1999-2003 Ford E-350 Super Duty, 2003 Ford E-450 Super Duty, 2003 Ford E-550 Super Duty, 2000-2003 Ford Excursion, 1999-2003 Ford F-250 Super Duty, 1999-2003 Ford F-350 Super Duty, 1999-2003 Ford F-450 Super Duty, 1999-2003 Ford F-550 Super Duty, 1995-2002 Ford E-350 Econoline Club Wagon, 2000-2002 Ford E-450 Econoline Super Duty, 2002 Ford E-550 Econoline Super Duty, 1996-1999 Ford Econoline Super Duty, 1995-1998 Ford E-350 Econoline, 1997 Ford F-250 HD, 1994-1997 Ford F-350, 1994-1997 Ford F-59 Commercial Stripped Chassis, 1995-1997 Ford F-Super Duty, and 1994-1996 Ford F-250. Part number S41768.020 is a practical match for rebuilds where oversize piston rings and direct-injection-specific ring geometry are required.

What It Helps Address

• Excessive oil consumption from worn ring sealing surfaces
• Compression loss caused by ring wear or cylinder wear after machining
• High friction in rebuilt engines during break-in and service
• Oil control issues in direct-injection engine applications
• Ring replacement needs during a full engine overhaul

Installation Notes

Verify bore size before installation and confirm that the cylinder has been machined for 0.020-inch oversize rings. Clean the ring grooves and cylinder walls thoroughly, and check end gap and ring orientation against the engine builder’s specifications. This part is intended for professional engine assembly practices on Ford E-350 and F-250 platform rebuilds.

Quality Assurance

MAHLE designs piston rings around OE requirements and focuses on reducing friction, ring mass, and oil consumption while supporting long service life. S41768.020 reflects that engineering approach with premium materials and a plasma-moly face coating for rebuild applications.