What does the .040 sizing mean for these pistons?

The '.040' in the part description indicates that these pistons are 0.040 inches larger in diameter than the standard factory size. This means the engine's cylinders will need to be bored out to this specific measurement to ensure a proper fit and seal.

Are the piston rings included with this set?

Yes, this Mahle piston set comes with the piston rings already mounted on the pistons. It also includes the necessary wrist pins and clips, providing a convenient, ready-to-install package for your engine rebuild.

What is the benefit of compensated ring grooves?

Compensated ring grooves help ensure that the piston rings maintain consistent pressure against the cylinder wall across their entire circumference. This leads to better sealing, improved oil control, and reduced blow-by, contributing to overall engine efficiency and longevity.

Mahle OE Piston Set 2243409WR040 - 7.3L DI Diesel V8 T .040

Name: Mahle OE NAVI 7.3L DI Diesel V8 T .040 w/ PCR Piston With Rings Set (Set of 8)
Brand: Mahle OE
SKU: mahle-oe-mahle-oe-navi-7-3l-di-diesel-v8-t-040-w-pcr-piston-with-rings-set-set-o-t14-53336
Price: 953.27 USD
Availability: BackOrder

Mahle OE NAVI 7.3L DI Diesel V8 T .040 w/ PCR Piston With Rings Set (Set of 8)

$953.27

On Backorder

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

Mahle OE 7.3L DI Diesel V8 T .040 piston set with rings. Features compensated ring grooves for better oil control and reduced engine noise.

Key Features

Fits 1994-2003 Ford E-Series and F-Series trucks with 7.3L DI Diesel V8 T engines.
Pistons are .040 inches overbore, ready for installation in a bored engine block.
Features compensated ring grooves for proper ring loading and oil control.
Expansion-controlled design reduces engine noise, wear, and emissions.
Includes mounted piston rings, pins, and clips for a complete set.
OE quality from Mahle, a leading global piston manufacturer.

Secure CheckoutFast Shipping631-982-0042

Will this fit your vehicle?

Product Details

If you're rebuilding the engine in your 7.3L Power Stroke diesel, getting the right pistons is crucial for long-term reliability. This set of eight Mahle OE pistons is specifically sized at .040 inches overbore, designed for the 7.3L DI Diesel V8 Turbo engine found in a wide range of Ford trucks and vans, including models like the 1999-2003 Ford F-250 Super Duty and the 2000-2003 Ford Excursion.

Mahle is a major OE piston manufacturer, and these pistons carry that same quality. They feature compensated ring grooves, which help ensure the piston rings are loaded correctly for optimal oil control and sealing. The expansion-controlled design means they're built with tight clearances, which helps reduce engine noise and wear, while also improving emissions and oil consumption. You get pistons ready to install, complete with mounted piston rings, and they also include the necessary pins and clips, making the assembly process more convenient for the engine builder.

This set is a solid choice for anyone looking to restore their 7.3L diesel engine to peak performance. Because these are .040 inch over pistons, they are intended for use in engines where the cylinders have been bored out to match this larger size during the rebuild process.