What is the advantage of reduced compression pistons?

Reduced compression pistons are typically used when an engine requires a slight overbore due to wear or damage. They help to bring the compression ratio back closer to the original factory specification, ensuring proper engine performance and combustion.

Do these pistons come with everything needed for installation?

Yes, this set includes eight pistons with the piston rings already mounted. It also comes with the necessary piston pins and clips, making them ready for installation into your engine.

Are these pistons suitable for a stock rebuild?

These are Mahle OE quality pistons, meaning they are designed to meet or exceed the specifications of the original equipment. They are a solid option for a stock rebuild, especially if your engine block requires a slight overbore.

2008-2010 Ford F-250 Super Duty Piston Set

Name: Mahle OE Ford 6.4L Diesel .25MM .010 /.025MM Reduced Compression Piston Set (Set of 8)
Brand: Mahle OE
SKU: mahle-oe-mahle-oe-ford-6-4l-diesel-25mm-010-025mm-reduced-compression-piston-set-t14-53121
Price: 830.62 USD
Availability: BackOrder

Mahle OE Ford 6.4L Diesel .25MM .010 /.025MM Reduced Compression Piston Set (Set of 8)

$830.62

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Fits 2008-2010 Ford F-250 Super Duty. Mahle OE reduced compression piston set for 6.4L Diesel engines. Includes mounted rings, pin, and clips.

Key Features

Fits 2008-2010 Ford F-250 Super Duty, F-350 Super Duty, F-450 Super Duty, and F-550 Super Duty.
Mahle OE pistons meet original equipment specifications for your 6.4L diesel engine.
Set includes eight pistons, each with compensated ring grooves for proper ring loading and oil control.
Expansion-controlled designs reduce engine noise, wear, and emissions while improving oil control.
Pistons come ready for installation with piston rings already mounted.
Includes piston pins and clips for a complete assembly.

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Will this fit your vehicle?

Product Details

Mahle is one of the largest original equipment piston manufacturers globally, known for producing parts that meet the same standards as what came on your vehicle from the factory. If you're rebuilding the engine in your 2008-2010 Ford F-250, F-350, F-450, or F-550 Super Duty with the 6.4L diesel, this set of eight Mahle OE reduced compression pistons is built to get you back on the road with confidence.

These pistons are designed with compensated ring grooves, which help ensure proper ring loading and effective oil control. They also feature expansion-controlled designs that allow for small fitting clearances. This attention to detail helps reduce engine noise, wear, and emissions, while also improving overall oil management. Mahle makes these pistons ready for installation, including mounted piston rings, along with the necessary pins and clips, simplifying the assembly process for the engine builder.

This set is specifically sized at .25MM, with undersizes of .010 and .025MM, meaning they are intended for engines that may require a slight bore hone to clean up. Because these are OE-quality replacements, they are designed to fit right and perform as expected in your Super Duty truck.