Product Description
MAHLE 224-3802 is a standard-bore (STD) marine-bowl/QSB-style piston set (6) for 2007.5–2018 6.7L Cummins ISB applications. This bowl design is commonly used when setting up a 6.7 for the 5.9-style injector spray pattern. Rings are not included (pistons only).
- Quantity: Set of 6 pistons (pins/clips as supplied by MAHLE; verify contents)
- Bore size: 107 mm (4.210 in)
- Combustion bowl: Marine/QSB style
- Application: 6.7L ISB/QSB Cummins (automotive & industrial)
Fitment
- 2007.5–2018 Ram 2500/3500 with 6.7L Cummins ISB (standard output), compatible with QSB-style bowl conversions
- Also used in QSB 6.7 industrial/marine applications where specified
Cross Reference Numbers
- Cummins: 4376353 (QSB-style piston kit), 3975868, 4931888, 4934860, 4955160, 5336107
- Related MAHLE piston-with-rings (6.7L): 224-3732WR (standard bore with rings; different bowl)
- Related ring sets: MAHLE S42140 (STD) for 2007.5–2018 6.7L Cummins
What’s Included
Pistons only, set of 6. Rings sold separately.
Recommended Add-Ons
- MAHLE S42140 piston ring set (STD) – six sets required
- New wrist pin bushings and cooling nozzles as needed
FAQ
Does this include rings?
No. This listing is for pistons only; rings are sold separately (see MAHLE S42140 STD).
Will the marine/QSB bowl work with my injectors?
This QSB bowl is commonly paired with 2004.5–2007 5.9L injector spray patterns when building a 6.7; verify spray pattern and tuning for your setup.
Is machine work required?
These are standard bore pistons. Inspect cylinder wear/out-of-round; hone or bore as needed to meet MAHLE/Cummins specs before installation.
What trucks does this fit?
2007.5–2018 Ram 2500/3500 6.7L Cummins (ISB). Industrial/marine QSB applications may also apply where specified in the service documentation.
