Product Description
MAHLE S42140.020 is an OE-quality single-cylinder piston ring set for the 2007.5–2018 6.7L Cummins (Ram 2500/3500). Plasma-moly top ring with CNC-controlled gap and barrel-faced profile helps reduce friction and blow-by while maintaining factory-spec sealing. Sold per cylinder—order qty 6 for a complete engine.
- Application: 6.7L Cummins ISB (2007.5–2018)
- Oversize: +0.020"
- Bore: 107.50 mm (4.233")
- Ring thicknesses (approx): 2.87 mm / 2.50 mm / 3.45 mm
- Construction: Plasma-moly top ring; reverse-twist / taper-faced designs for groove sealing and efficient compression
- Set covers one piston
- GTIN/UPC: 027067854674
Fitment
- 2007.5, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018 Ram 2500 / 3500 with 6.7L Cummins (24-valve)
Cross Reference & Related Sizes
- MAHLE family: S42140 (standard), S42140.010, S42140.020, S42140.030, S42140.040, S42140.050 (verify size before ordering)
- Alternate listings: Summit Racing MAH-S42140020; JEGS 695/S42140.020
What’s Included
Complete ring pack for a single piston: compression, scraper, and oil control rings per OE-style specifications.
FAQ
Is this a full engine set?
No. This is a single-cylinder set. Order quantity 6 for a complete engine.
Will it fit my 6.7L Cummins?
Yes—fits Ram 2500/3500 with 6.7L Cummins model years 2007.5–2018. Always confirm bore/oversize before purchase.
What oversize is this?
This is +0.020" (0.50 mm) oversize with ~107.50 mm bore compatibility.
Do I need to gap the rings?
Yes—measure and set end gap to the engine builder’s spec for your use case (stock vs. performance/tow).
