Product Description
MAHLE 224-3732WR.020 piston with rings is a .020" oversize replacement for the 2007.5–2018 6.7L Cummins. Expansion-controlled design, OE-quality materials, and matched rings deliver quiet operation, excellent oil control, and durability in stock or mild-build applications. Sold per piston with rings—order 6 for a complete engine set.
- Oversize: +0.020" (approx. 4.233"/107.518 mm bore)
- Includes: Piston, rings pre-sized for .020" over, wrist pin & clips
- Design: Bowl-top diesel piston, expansion-controlled for tight clearances
- GTIN/UPC: 027067933409
- MPN: 2243732WR020
Fitment
- 2007.5, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018 Dodge Ram 2500/3500 with 6.7L Cummins (VIN A/L)
Key Specs
- Bore @ .020" over: ~107.518 mm (4.233")
- Ring stack (typical set): 3.00 mm top / 2.50 mm second / 3.50 mm oil
- Piston pin OD: 40.00 mm
- Sold individually; quantity 6 required
Cross-Reference / OE Numbers
- Cummins: 4376348, 5336103 (application references)
- MAHLE (piston only): 224-3732.020
What’s Included
One piston, ring set for +.020", wrist pin and retaining clips.
FAQ
Is this priced per piston or for a full set?
Priced per piston with rings. Order a quantity of 6 for a complete engine.
Will this fit my 6.7L Cummins?
Yes—fits 2007.5–2018 Ram 2500/3500 6.7L Cummins. Machine the block to +.020" and verify final bore/hone to spec.
What’s the bore size at .020" over?
Approximately 4.233" (107.518 mm), which corresponds to .020" over the stock 6.7L bore.
Are rings, pins, and clips included?
Yes—this WR.020 kit includes rings, pin, and clips matched to the piston.
Do I need all six to match?
Yes—replace as a matched set of six to maintain balance and compression across cylinders.
