What does '0.020 inch undersize' mean for these pistons?

This means the pistons are manufactured to be 0.020 inches smaller in diameter than the original factory specification. This size is typically used when the engine's cylinders have been bored out during a rebuild to clean up wear or damage.

What is included with this piston set?

This set includes eight pistons, along with the piston rings, wrist pins, and clips already mounted on each piston. It's a complete package ready for installation into your engine.

Are these pistons suitable for all 7.3L IDI Turbo Diesel engines?

This specific set is verified to fit 1994 Ford F-250, F-350, F-59 Commercial Stripped Chassis, and F-Super Duty models. It is important to confirm fitment for your specific vehicle year and configuration.

1994 Ford F-250 Piston Set | Mahle OE

Name: Mahle OE NAVI 7.3L IDI Turbo Dsl V8 T .020 w/ PC Piston Set (Set of 8)
Brand: Mahle OE
SKU: mahle-oe-mahle-oe-navi-7-3l-idi-turbo-dsl-v8-t-020-w-pc-piston-set-set-of-8-t14-53494
Price: 667.60 USD
Availability: BackOrder

Mahle OE NAVI 7.3L IDI Turbo Dsl V8 T .020 w/ PC Piston Set (Set of 8)

$667.60

On Backorder

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

Fits 1994 Ford F-250. Mahle OE cast piston set, 0.020 inch undersize, includes rings, pins, and clips for easier installation.

Key Features

Fits 1994 Ford F-250, F-350, F-59 Commercial Stripped Chassis, and F-Super Duty.
Designed for the 7.3L IDI Turbo Diesel V8 engine.
Set includes 8 pistons, each 0.020 inch undersize.
Features compensated ring grooves for proper ring loading and oil control.
Expansion-controlled design reduces engine noise, wear, and emissions.
Pistons come with pre-mounted rings, pins, and clips for easier installation.

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Will this fit your vehicle?

Product Details

These Mahle OE pistons are built to the original factory specifications for your 1994 Ford F-250, F-350, F-59 Commercial Stripped Chassis, or F-Super Duty with the 7.3L IDI Turbo Diesel V8 engine. They come 0.020 inch undersize, which is important if your engine block has been bored out during a rebuild. Mahle is a major OE piston manufacturer, so you know these are made to the same standards as the parts that originally came in your truck.

What sets these pistons apart is their compensated ring grooves. This design ensures the piston rings are loaded correctly, which is key for proper oil control and sealing. They also feature an expansion-controlled design. This means they're built with very small fitting clearances, helping to reduce engine noise, wear, and emissions while further improving oil control. Mahle makes installation easier by including the piston rings, wrist pins, and clips already mounted on the pistons, so they're ready to go right out of the box.

This set includes eight pistons, enough for a complete engine overhaul. Please note that these pistons are not CARB approved and cannot be shipped to California.