Mahle 42108CP Engine Piston Ring Set

Mahle 42108CP Piston Ring Set

The Mahle 42108CP engine piston ring set is built for 3.9173 in bore applications and uses premium ring materials for precise sealing and reduced friction. It is a standard-size, shallow-groove ring set engineered for Chrysler, Dodge, Jeep, and Ram V8 applications from 2009-2017.

Key Features

• Part number: 42108CP
• 3.9173 in bore diameter
• Standard oversize for OE-style rebuilds
• Plasma-Moly piston ring face coating
• Top ring material: carbon steel
• Second ring material: cast iron
• Oil ring assembly material: stainless steel
• Premium item grade
• Shallow groove design

Detailed Description

Mahle piston rings are developed around OE requirements, with attention to lower friction, controlled ring mass, reduced oil consumption, and long service life. The 42108CP uses a carbon steel top ring with a plasma-moly face coating, a cast iron second ring, and a stainless steel oil ring assembly to support consistent cylinder sealing and oil control in demanding engine rebuilds. This ring set is a strong match for 2009-2017 Chrysler 300, Dodge Challenger, Dodge Charger, Dodge Durango, Jeep Grand Cherokee, and Ram 1500 applications where the correct shallow-groove configuration is required. This part cross-references Hastings Piston Rings (e.g., 2M5141) for the same application.

What This Part Helps Address

• Excessive oil consumption from worn or damaged rings
• Low compression caused by poor cylinder sealing
• Blow-by from ring wear or loss of tension
• Reduced performance during engine rebuilds
• Inconsistent oil control in high-mileage engines

Installation Notes and Tips

Verify bore diameter, ring groove depth, and ring end gap before assembly. Confirm the engine uses the standard 3.9173 in bore and shallow-groove ring configuration listed for the application. Clean the piston ring lands thoroughly, follow the engine builder’s ring orientation and gap specifications, and inspect cylinder wall condition before installation. Fits 2009-2017 Chrysler 300, N/A. Fits 2009-2017 Dodge Challenger, N/A. Fits 2009-2017 Dodge Charger, N/A. Fits 2011-2017 Dodge Durango, N/A. Fits 2009 Dodge Durango, N/A. Fits 2009-2017 Jeep Grand Cherokee, N/A. Fits 2011-2017 Ram 1500, N/A. Fits 2011-2017 Ram 2500, N/A. Fits 2011-2017 Ram 3500, N/A. Fits 2011-2015 Ram 4000, N/A. Fits 2009-2010 Dodge Ram 1500, N/A. Fits 2009-2010 Dodge Ram 2500, N/A. Fits 2009-2010 Jeep Commander, N/A. Fits 2009 Chrysler Aspen, N/A. Fits 2009 Dodge Ram 3500, N/A.

Quality Assurance

Mahle manufactures this premium piston ring set to meet OE-driven performance targets for friction control, oil management, and service life. The 42108CP is built with application-specific materials and coatings for rebuild accuracy in Chrysler, Dodge, Jeep, and Ram engines.