Product Description
Restore 6.4L power and reliability with the MAHLE 224-3851WR MAXX FORCE 7 piston set—OE-grade aluminum construction, coated skirts, and factory-matched rings deliver tight sealing, clean burn, and long life under heavy tow or tune-appropriate builds. Price on CPP Diesel is for a complete set of 8 pistons with rings to service the entire V8.
Fitment
- 2008, 2009, 2010 Ford Super Duty F-250 / F-350 / F-450 / F-550 — 6.4L Power Stroke (VIN R)
- Navistar MaxxForce 7 medium-duty applications (reference years commonly 2008–2015; verify by VIN/engine tag)
Cross-Reference / Alternatives (MAHLE on CPP Diesel only)
- Oversizes: 224-3851WR-0.25MM, 224-3851WR-0.50MM, 224-3851WR-0.75MM
- Alternative OE-style family: 224-3666WR series
- Reduced-compression option: 224-3953WR (STD)
- Related ring sets: S42097 (STD), S42097.020 (+.020")
FAQ
Is the price for one piston or the full engine set?
Sold as a complete set of eight pistons with rings, pins, and retainers.
Will these fit all 2008–2010 6.4L Power Stroke trucks?
Yes—these standard-bore pistons fit the 6.4L Power Stroke (VIN R). Always confirm bore and machine specs.
Do the pistons include rings and pins?
Yes—each piston includes a matched ring pack plus pin and retainers for ready-to-install convenience.
When should I choose an oversize?
Select +0.25mm, +0.50mm, or +0.75mm after machine shop measurement/overbore to restore proper clearance and ring seal.
Specifications for Mahle 224-3851WR
| Attribute | Value |
|---|---|
| Brand | MAHLE |
| Part Number | 224-3851WR (Standard Bore) |
| Engine Compatibility | 2008–2010 Ford 6.4L Power Stroke (VIN R); Navistar MaxxForce 7 (verify by VIN) |
| Set Size | 8 pistons (complete engine set) |
| Includes | Pistons, matched ring packs, pins & retainers |
| UPC | 027067053107 |
| GTIN | 00027067053107 |
| Shipping | Free Shipping (contiguous U.S.) |
| Prop 65 Warning | Cancer and Reproductive Harm — P65Warnings.ca.gov |
