What is the compression ratio achieved with these pistons?

These Mahle pistons, when used with the specified stroke and rod length, achieve a compression ratio of 11.6:1. This is a notable increase over stock and is suitable for performance-oriented Hemi engines.

What material are these pistons made from and why is it important?

The pistons are made from 4032 aluminum. This alloy is chosen for its strength and ability to withstand higher operating temperatures and pressures commonly found in performance engine builds, offering improved durability over cast aluminum.

Are these pistons legal for use in California?

No, these pistons are not CARB approved and cannot be shipped to California due to emissions regulations.

Mahle Hemi Piston Set 4.05in Bore 11.6 CR 930276337

Name: Mahle MS Piston Set Hemi 394ci 4.05in Bore 3.58in Stroke 6.125in Rod .927 Pin -6cc 11.6 CR Set of 8
Brand: Mahle
SKU: mahle-mahle-ms-piston-set-hemi-394ci-4-05in-bore-3-58in-stroke-6-125in-rod-927-p-t14-521760
Price: 896.65 USD
Availability: BackOrder

Mahle MS Piston Set Hemi 394ci 4.05in Bore 3.58in Stroke 6.125in Rod .927 Pin -6cc 11.6 CR Set of 8

$896.65

On Backorder

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

Mahle Hemi Piston Set for 394ci engines. Features a 4.05in bore and 11.6:1 compression ratio.

Key Features

Set of 8 Mahle MS pistons for Hemi engines.
Designed for 394 cubic inch Hemi engines.
Features a 4.050 inch bore and a -6cc dish volume.
Achieves an 11.6:1 compression ratio with a 3.58 inch stroke and 6.125 inch rod.
Utilizes a .927 inch pin size.
Constructed from 4032 aluminum for strength and heat resistance.

These pistons are designed for Chrysler Hemi 394 cu in engines. Compatibility with specific head configurations (5.7L and 6.1L) is noted.

⚠️ 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

Mahle is well-known for making solid engine components, and this piston set for your Hemi engine is no exception. If you're rebuilding a 394 cubic inch Hemi, these pistons are built to handle the demands of a performance engine. They are designed to work with both 5.7L and 6.1L heads, giving you some flexibility in your build.

This set includes eight pistons, each weighing 429 grams, with a 4.050 inch bore and a -6cc dish volume. This dish, combined with the 3.58 inch stroke and 6.125 inch rod length, results in a healthy 11.6:1 compression ratio, which is great for performance applications. The pistons utilize a .927 inch pin size, a common standard for many performance builds. The material used is 4032 aluminum, known for its strength and ability to handle higher temperatures and pressures compared to cast aluminum.

When installing these pistons, remember they are designed for a specific bore size and stroke. It's always a good idea to consult your engine builder or a service manual for the precise installation procedures, including proper ring gap and bearing clearances. Please note that these pistons are not CARB approved and cannot be shipped to California.