Mahle 41550CP.020 Engine Piston Ring Set

Engine Piston Ring Set Overview

MAHLE 41550CP.020 is a premium engine piston ring set built for 0.020 in oversize applications with a 3.973 in bore diameter. It combines ductile iron, cast iron, and stainless steel ring materials with a plasma-moly face coating to support efficient sealing and reduced oil consumption.

Compatible with Ford Explorer, Ford Ranger, and Mazda B4000 applications, this piston ring set is engineered around OE-driven requirements for friction control and service life. The 41550CP.020 part number is also referenced for related applications across the same engine family.

Key Features

• 0.020 in oversize piston ring set for matched rebuild applications
• 3.973 in bore diameter for precise cylinder fitment
• Plasma-moly face coating for wear resistance at the ring face
• Top ring in ductile iron, second ring in cast iron, and oil ring assembly in stainless steel
• Shallow groove oil ring assembly design
• Premium grade construction for engine rebuild work

Detailed Description

MAHLE piston rings are developed from OE requirements and focus on lowering friction, reducing ring mass, and helping control engine oil consumption. The 41550CP.020 uses a 1.60 mm top ring, 1.75 mm second ring, and 3.50 mm oil ring assembly thickness, with a shallow groove oil ring assembly and plasma-moly face coating to support consistent sealing under operating load. For Ford Explorer, Ford Ranger, and Mazda B4000 rebuilds, the 41550CP.020 provides a fitment-specific solution for oversize cylinder service.

This part cross-references Hastings Piston Rings (e.g., 2M4627020) and Sealed Power (e.g., E613K50MM) for the same application.

What It Is Used For

• Restoring cylinder sealing after bore wear or machining
• Reducing oil consumption caused by worn ring packs
• Addressing compression loss from ring fatigue or glazing
• Supporting rebuilds that require 0.020 in oversize rings
• Replacing worn piston rings during engine overhaul work

Installation Notes and Tips

Verify bore size, ring thickness, and oversize specification before installation. Confirm the cylinder finish and ring end gap during engine assembly, and match the ring set to the correct engine application for Ford Explorer, Ford Ranger, or Mazda B4000 service. Clean ring grooves thoroughly and follow the engine builder’s measurement procedure during installation.

Quality Assurance

MAHLE piston rings are engineered to OE requirements and built with materials and coatings selected for friction control, oil management, and service life. The 41550CP.020 is a premium-grade ring set designed for rebuild accuracy and consistent engine sealing.