Product Description
MAHLE 224-3953WR-0.75 piston with rings for the 2008–2010 Ford 6.4L Power Stroke (also fits Navistar MaxxForce 7) features a –0.75 mm reduced compression height and coated skirts to help address stock piston cracking concerns while improving durability.
- Engine: Ford 6.4L Power Stroke (VIN R), Navistar MaxxForce 7
- Spec: –0.75 mm reduced compression height, skirt-coated, includes matched ring set
- Intended use: Honed/overbored blocks requiring .75 mm oversize
- Sold/packaged as: Full set of 8 pistons with rings (no singles)
Pricing note: The price shown on this CPP Diesel page is for a set of 8.
Fitment
- 2008, 2009, 2010 Ford F-250 / F-350 / F-450 / F-550 Super Duty with 6.4L Power Stroke (VIN R)
- 2008–2010 Navistar MaxxForce 7 applications
Cross Reference / Alternatives
- MAHLE Standard Reduced Compression: 224-3953WR (STD)
- MAHLE –0.50 mm Reduced Compression: 224-3953WR-0.50MM
- Related MaxxForce 7 variant: 224-3851WR-0.75MM
- MPN variant formatting: 2243953WR075MM
FAQ
Will these pistons fit my 6.4L Power Stroke?
Yes. They are designed for 2008–2010 6.4L Power Stroke (VIN R) and MaxxForce 7 platforms. Verify bore size and machine work with your builder.
Are these sold as singles or a set?
They are sold as a full set of 8 with rings on CPP Diesel. Some retailers list per-piece pricing—be sure to compare like-for-like.
What’s the benefit of –0.75 mm reduced compression height?
Lower compression height helps mitigate factory piston cracking issues and supports builds that require slight overbore after honing.
Do they include rings?
Yes—each piston arrives with matched rings for proper seal and break-in.
Anything special to note for installation?
Confirm piston-to-wall clearance, RA/surface finish, and ring end gaps with your machine shop’s specs and MAHLE guidelines.
