What does '0.030 inch undersize' mean for these pistons?

This means the pistons are 0.030 inches smaller in diameter than the standard factory size. This is common when rebuilding an engine where the cylinders have been bored out to a larger size to clean up wear or damage.

Are the piston rings included with this set?

Yes, Mahle OE pistons are typically supplied with the piston rings already mounted onto the pistons. This set also includes the necessary piston pins and clips for convenience.

What is the benefit of an 'expansion-controlled design'?

An expansion-controlled design helps the piston maintain optimal clearance within the cylinder bore as the engine heats up. This reduces noise, minimizes wear, and improves oil control and emissions.

1994 Ford F-250 Piston Set | Mahle OE

Name: Mahle OE NAVI 7.3L IDI Turbo Dsl V8 T .030 w/ PC Piston Set (Set of 8)
Brand: Mahle OE
SKU: mahle-oe-mahle-oe-navi-7-3l-idi-turbo-dsl-v8-t-030-w-pc-piston-set-set-of-8-t14-53495
Price: 671.49 USD
Availability: BackOrder

Mahle OE NAVI 7.3L IDI Turbo Dsl V8 T .030 w/ PC Piston Set (Set of 8)

$671.49

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, 0.030 inch undersize. Set of 8.

Key Features

Fits 1994 Ford F-250, F-350, F-59 Commercial Stripped Chassis, and F-Super Duty.
Designed for 7.3L IDI Turbo Diesel V8 engines.
This is a set of 8 cast pistons, sized 0.030 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 piston rings, pin, and clips for easier installation.

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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 exact specifications of vehicle manufacturers. This Mahle OE NAVI piston set is built for your 1994 Ford F-250, F-350, F-59 Commercial Stripped Chassis, or F-Super Duty equipped with the 7.3L IDI Turbo Diesel V8 engine. These pistons are specifically sized at 0.030 inch undersize, crucial for engine rebuilds where cylinders may have been bored out to correct imperfections or wear.

These pistons feature compensated ring grooves, which ensure the piston rings are loaded correctly. This is important for maintaining proper oil control and sealing within the cylinder. They also incorporate an expansion-controlled design. This means the pistons are made to maintain small, precise clearances within the cylinder bore even as temperatures change. This design helps reduce engine noise, minimize wear on components, lower emissions, and further improve oil management. Mahle makes installation convenient by offering these pistons ready to go with the piston rings already mounted, and they include the necessary piston pins and clips.

This set includes eight pistons, enough for a complete engine overhaul on your V8 diesel. Please note that this part is not CARB approved and cannot be shipped to California.