Mahle 42156CP.020 Engine Piston Ring Set

Mahle 42156CP.020 Piston Ring Set

Mahle 42156CP.020 is a premium engine piston ring set built for 4.1106-inch bore applications with a 0.020-inch oversize. It combines carbon steel, cast iron, and stainless steel ring materials with a plasma-moly face coating to support controlled oil use, reduced friction, and durable sealing in service.

Key Features

• Part number 42156CP.020 for oversize engine rebuild applications
• 4.1106-inch bore diameter with shallow groove sizing
• Top ring material: carbon steel with 0.0469-inch axial height
• Second ring material: cast iron with 0.0469-inch axial height
• Oil ring assembly material: stainless steel with 0.0787-inch axial height
• Plasma-moly piston ring face coating for wear resistance
• Premium item grade for rebuild and overhaul work

Detailed Description

Mahle piston rings are engineered around OE requirements, with attention to friction control, ring mass reduction, oil consumption management, and service life. The 42156CP.020 ring set uses a carbon steel top ring, cast iron second ring, and stainless steel oil ring assembly to match the demands of modern gasoline engine rebuilds. The shallow groove design and 0.020-inch oversize specification make this set a direct choice for properly machined cylinders that require oversize piston rings. This part number 42156CP.020 is listed for select Chrysler, Dodge, Jeep, and Ram applications, including 2011-2017 Dodge Challenger, 2012-2017 Dodge Charger, and 2012-2014 Chrysler 300.

Vehicle Fitment

• Fits 2011-2017 Dodge Challenger, N/A. Notes: Size 0.020in; Material Grade Premium; Material UCR-Carbon Steel; LCR-Ductile Iron; OCR-Stainless Steel; Facing UCR-Plasma-Moly; OCR-Chrome; Axial Height UCR-1.2mm; LCR-1.2mm; OCR-2.0mm; Ring Type UCR:RF-13PF; LCR:THM-17; OCR: CP-20; Shallow Groove
• Fits 2012-2017 Dodge Charger, N/A. Notes: Size 0.020in; Material Grade Premium; Material UCR-Carbon Steel; LCR-Ductile Iron; OCR-Stainless Steel; Facing UCR-Plasma-Moly; OCR-Chrome; Axial Height UCR-1.2mm; LCR-1.2mm; OCR-2.0mm; Ring Type UCR:RF-13PF; LCR:THM-17; OCR: CP-20; Shallow Groove
• Fits 2012-2017 Jeep Grand Cherokee, N/A. Notes: Size 0.020in; Material Grade Premium; Material UCR-Carbon Steel; LCR-Ductile Iron; OCR-Stainless Steel; Facing UCR-Plasma-Moly; OCR-Chrome; Axial Height UCR-1.2mm; LCR-1.2mm; OCR-2.0mm; Ring Type UCR:RF-13PF; LCR:THM-17; OCR: CP-20; Shallow Groove
• Fits 2014-2015 Ram 2500, N/A. Notes: Size 0.020in; Material Grade Premium; Material UCR-Carbon Steel; LCR-Ductile Iron; OCR-Stainless Steel; Facing UCR-Plasma-Moly; OCR-Chrome; Axial Height UCR-1.2mm; LCR-1.2mm; OCR-2.0mm; Ring Type UCR:RF-13PF; LCR:THM-17; OCR: CP-20; Shallow Groove
• Fits 2014-2015 Ram 3500, N/A. Notes: Size 0.020in; Material Grade Premium; Material UCR-Carbon Steel; LCR-Ductile Iron; OCR-Stainless Steel; Facing UCR-Plasma-Moly; OCR-Chrome; Axial Height UCR-1.2mm; LCR-1.2mm; OCR-2.0mm; Ring Type UCR:RF-13PF; LCR:THM-17; OCR: CP-20; Shallow Groove
• Fits 2012-2014 Chrysler 300, N/A. Notes: Size 0.020in; Material Grade Premium; Material UCR-Carbon Steel; LCR-Ductile Iron; OCR-Stainless Steel; Facing UCR-Plasma-Moly; OCR-Chrome; Axial Height UCR-1.2mm; LCR-1.2mm; OCR-2.0mm; Ring Type UCR:RF-13PF; LCR:THM-17; OCR: CP-20; Shallow Groove

Common Uses

• Restoring cylinder sealing after an engine rebuild
• Addressing oil control concerns tied to worn ring packs
• Replacing rings during overbore machining with 0.020-inch oversize pistons
• Supporting compression recovery in high-mileage engines
• Refreshing ring sealing in Chrysler, Dodge, Jeep, and Ram V8 applications

Installation Notes

Confirm bore size, groove style, and oversize requirements before installation. Cylinder finish, ring end gap, and piston groove clearance should be measured during assembly to match the machined block. Clean ring lands and cylinder walls thoroughly, and follow the engine builder’s specifications for break-in and lubrication. For fitment searches, this Mahle 42156CP.020 piston ring set is commonly referenced for Dodge Challenger, Dodge Charger, and Chrysler 300 rebuilds.

Quality Assurance

Mahle develops piston rings to OE-level engineering standards with an emphasis on friction reduction, oil control, and long service life. The plasma-moly face coating and premium material mix reflect that engineering approach for rebuild applications. This part number 42156CP.020 is built for precise oversize service in the listed vehicle applications.