What is the main advantage of using forged pistons over cast pistons?

Forged pistons are made from a solid block of aluminum that is heated and hammered into shape. This process creates a much stronger and more durable piston compared to cast pistons, allowing them to withstand higher cylinder pressures and temperatures common in performance applications.

What compression ratio do these pistons achieve?

These Mahle pistons have a 10.2cc dish volume, which results in a 10.9:1 compression ratio when used with compatible Hemi cylinder heads. This is an updated ratio for improved performance over stock configurations.

Are these pistons compatible with all Hemi engines?

These pistons are specifically designed for Hemi 5.7L and 6.1L engines with a 349 cubic inch displacement. While they are compatible with all 5.7L and 6.1L heads, it's always best to confirm fitment with your specific engine build and supporting components.

Mahle 5.7L Hemi Piston Set 3.937in Bore 930276037

Name: Mahle MS Pist Hemi 5.7L 349cid 3.937in Bore 3.579in Strk 6.242in Rod .927 Pin 10.2cc 10.9 CR Set 8
Brand: Mahle
SKU: mahle-mahle-ms-pist-hemi-5-7l-349cid-3-937in-bore-3-579in-strk-6-242in-rod-927-p-t14-371114
Price: 968.97 USD
Availability: BackOrder

Mahle MS Pist Hemi 5.7L 349cid 3.937in Bore 3.579in Strk 6.242in Rod .927 Pin 10.2cc 10.9 CR Set 8

$968.97

On Backorder

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

Mahle 5.7L Hemi forged piston set. 3.937in bore, 10.9:1 CR. Not CARB approved.

Key Features

This is a set of eight Mahle forged pistons.
Designed for Hemi 5.7L and 6.1L engines.
Engine displacement is 349 cubic inches.
Features a 3.937-inch bore and a 3.579-inch stroke.
Includes 6.242-inch connecting rods and a .927-inch pin.
Each piston weighs 445 grams with a 10.2cc dish volume.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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Product Details

This is a set of eight Mahle forged pistons designed for Hemi 5.7L and 6.1L engines. You get the pistons themselves, ready to be installed in your engine build. These are built for a 349 cubic inch displacement, with a 3.937-inch bore and a 3.579-inch stroke. The connecting rod length is 6.242 inches, and they use a .927-inch pin. Each piston weighs 445 grams and has a dish volume of 10.2cc, which results in a 10.9:1 compression ratio when paired with compatible heads.

Mahle is known for making well-built engine components, and these forged pistons are no exception. Forged pistons are stronger than cast pistons, making them a solid choice for performance builds or engines that see hard use. They can handle higher cylinder pressures and temperatures, which is crucial when you're pushing an engine beyond its stock capabilities. The specific design details, like the 10.2cc dish and the 10.9:1 compression ratio, are carefully calculated to work with Hemi heads for improved performance. These pistons are designed to fit right into your Hemi engine build, assuming you're using the correct supporting components.

When rebuilding or modifying your Hemi engine, choosing quality internal components like these pistons is key to a reliable and powerful outcome. Keep in mind that these pistons are not CARB approved and cannot be shipped to California. Always refer to your engine builder's specifications and the manufacturer's installation instructions for proper assembly and break-in procedures.