


MAHLE 224-3851WR-0.75MM Maxx Force 7 Piston With Rings (.75MM) (2008-2010 6.4L Powerstroke)
Fits: Ford 6.4L (2008-2010 Powerstroke)
Diesel Dollars is Southern Diesel Supply's Loyalty Program. Purchasing with Us Earns you 1 Point for every 1 Dollar spent to use for future buys!
By ordering the MAHLE 224-3851WR-0.75MM Maxx Force 7 Piston With Rings (.75MM) (2008-2010 6.4L Powerstroke) you will earn 170 DIESEL DOLLARS in your SDS Fuel Tank!
The MAHLE 224-3851WR-0.75MM Maxx Force 7 Piston With Rings (.75MM) is for the 2008-2010 Ford 6.4L Powerstroke and the Navistar Maxx Force 7. Built to factory specifications, it delivers factory performance. Engine builders use it in 6.4L rebuilds to eliminate the cracking issues of the stock pistons.
Fitment
Add it to your 2008-2010 Ford 6.4L Power Stroke (F-250 and F-350 Super Duty pickups, the F-450 Super Duty pickup, and F-450/F-550 chassis cabs) or Navistar Maxx Force 7. These pistons are designed for the Navistar Maxx Force 7 engine and are commonly used in 6.4L Powerstroke engines. Please consult your machine shop/engine builder to confirm fitment in your application. The 6.4L is unique to 2008-2010, and nothing in its long block interchanges with the 6.0L or the 6.7L, so this is not a piston for those engines. Verify fitment by VIN or call us. More Power Stroke parts are here.
Why this part
Stock 6.4L pistons crack, and that is the reason this piston exists in a Power Stroke catalog. Maxx Force 7 industrial pistons have a de-lipped bowl and a thicker crown, and they are the usual replacement for cracked factory pistons during a rebuild. If you are building for high horsepower, forged pistons are the other route, and we can talk that through with you.
Find out why the old pistons failed before new ones go in. A leaking or stuck-open piezo injector can, in the worst case, melt a piston with no warning light, so test the injectors and look at fuel quality. When the heads come off, mill them no more than 0.005 in, and install head studs instead of reusing the torque-to-yield bolts. After the rebuild, check the dipstick weekly and change the oil every 5,000 miles. If the level ever reads over max, change it right away, because a rising level means fuel is getting into the oil.
What you get
- MAHLE 224-3851WR-0.75MM Maxx Force 7 piston with rings, .75MM size
- SKU 2243851WR075MM
Features:
- Factory Construction
- Maintains a Factory Performance
How it is sold: Sold as a set only. Priced per piece, so set your quantity to one piston per cylinder.
About MAHLE
MAHLE built its name on pistons. The company started in 1920 as a small engine shop in Stuttgart, Germany, and today makes pistons, rings, liners and bearings for engine builders, including piston-with-rings assemblies in standard and oversize bores. Diesel shops have relied on MAHLE hard parts for years.
Frequently asked questions
Why put a Maxx Force 7 piston in a 6.4L?
The stock 6.4L pistons have a cracking problem. Maxx Force 7 pistons, with their de-lipped bowl and thicker crown, are the usual replacement for cracked factory pistons in a rebuild.
Can I buy just one piston?
No. This piston is sold as a set only and priced per piece. Order one for each cylinder.
Is the .75MM size right for my engine?
That depends on how your machine shop finishes the bores. Have your machine shop or engine builder confirm the size before you order, then call us with what they give you.
Questions on fitment? Call the shop at the number in the header. We install everything we sell.

Diesel Dollars is Southern Diesel Supply's Loyalty Program. Purchasing with Us Earns you 1 Point for every 1 Dollar spent to use for future buys!
By ordering the MAHLE 224-3851WR-0.75MM Maxx Force 7 Piston With Rings (.75MM) (2008-2010 6.4L Powerstroke) you will earn 170 DIESEL DOLLARS in your SDS Fuel Tank!


