Product Description
MAHLE 41940.04 (.040” oversize) piston ring set for the 2003–2007 Ford 6.0L Power Stroke. Built to OE specs with plasma-moly faced top rings for durability and fast seating. CPP Diesel sells piston rings in sets of 8 to complete one V8 engine.
- Engine: Ford Power Stroke 6.0L V8 (2003–2007 F-250/F-350/F-450/F-550)
- Oversize: +0.040” (3.780" bore)
- Top ring (UCR): plasma-moly, ~2.3 mm; Second ring (LCR): ductile iron, ~2.0 mm; Oil ring (OCR): stainless steel, ~3.44 mm
- Construction: OE-quality materials, engineered for factory performance and longevity
Fitment
- 2003, 2004, 2005, 2006, 2007 Ford Super Duty F-250 / F-350 / F-450 / F-550 with 6.0L Power Stroke diesel
Cross Reference / Interchange
- MAHLE: 41940.040, 41940-040, S41940.040
- Platform references: Ford 6.0L Power Stroke; Navistar VT365/MaxxForce 5 family (verify oversize before ordering)
What’s Included
Complete engine set of piston rings for all eight cylinders (.040" oversize).
FAQ
Do these rings fit my 2003–2007 6.0L Power Stroke?
Yes—this .040" oversize set is for 6.0L Power Stroke engines that have been bored +0.040". Always measure the bore.
Are these sold per cylinder or per engine?
CPP Diesel sells piston rings in complete sets of 8 to service the entire V8.
What ring materials are used?
Top ring is plasma-moly faced, second ring is ductile iron, oil ring is stainless—OE-quality for durability.
Break-in tips?
Verify end gaps, follow MAHLE specs, use proper honing finish, and change oil after initial break-in.
