When a 2007.5-2018 Ram 6.7L Cummins block has been bored and honed .020 over, you need a matching oversize piston without guessing at ring packaging. The Mahle 224-3732.020 is the .020-over cast piston (rings not included) for truck 6.7 Cummins rebuilds where your machine shop has already measured the bore.

This is the piston-only version of the 224-3732 family. Order rings separately (such as Mahle S42140.020) or use the with-rings sibling if you want rings in the same box.

What you get:

• One Mahle cast piston, .020 oversize (224-3732.020)
• Rings not included — source separately to match your bore and ring spec
• OE-style design with compensated ring grooves for ring loading and oil control
• Expansion-controlled skirt design for tight fitting clearances
• Priced per piston; a complete 6.7L inline-6 needs six
• Fits 2007.5-2018 Dodge/Ram 2500/3500/4500/5500 6.7L Cummins truck applications

Specs:

• Manufacturer part number: 224-3732.020
• Bore: +.020" over standard (standard bore reference 4.21" / 107.0 mm)
• Piston skirt clearance: 0.0047"
• Cross-reference: 4938619
• Related with-rings part: 224-3732WR.020
• Suggested .020 ring set (sold separately): S42140.020
• Does not include rings
• Confirm truck ISB/ETJ application — industrial 6.7L fitment is not verified here

For rebuilders who already have a ring plan and a measured .020 over bore on a 2007.5-2018 6.7 Cummins. Verify fitment for your truck before ordering.