What is the compression ratio of these pistons?

These Mahle pistons are designed to achieve a 10.4:1 compression ratio when used with compatible cylinder heads and a 3.580 inch stroke crankshaft. This ratio is suitable for many performance applications.

What material are these pistons made from?

The pistons are forged from 4032 aluminum alloy. This material is chosen for its strength and ability to handle higher temperatures and pressures found in performance engines, while also managing thermal expansion well.

Are these pistons compatible with all Hemi engines?

This specific set is designed for 370 cubic inch Hemi engines with a 4.055 inch bore. It's important to verify your engine's specific displacement and bore size before purchasing to ensure proper fitment.

Mahle Hemi Piston Set 4.055in Bore 930111655

Name: Mahle MS Piston Set Hemi 370ci 4.055in Bore 3.58in Stroke 6.24in Rod .984 Pin -1cc 10.0 CR Set of 8
Brand: Mahle
SKU: mahle-mahle-ms-piston-set-hemi-370ci-4-055in-bore-3-58in-stroke-6-24in-rod-984-p-t14-29117
Price: 968.97 USD
Availability: BackOrder

Mahle MS Piston Set Hemi 370ci 4.055in Bore 3.58in Stroke 6.24in Rod .984 Pin -1cc 10.0 CR Set of 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 Hemi Piston Set for 370ci engines. Forged replacement assembly with 4.055in bore and 10.4:1 compression.

Key Features

Set of 8 forged replacement pistons for Hemi 370ci engines.
4.055 inch bore size.
Designed for a 3.580 inch stroke and 6.242 inch connecting rod.
Features a -1cc valve relief and 10.4:1 compression ratio.
Constructed from 4032 aluminum alloy for strength and thermal stability.
Includes 0.984 inch wrist pins.

This piston set is designed for Chrysler Hemi 370 cu in. engines. It is not CARB approved and cannot be shipped to California.

⚠️ 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

If you're rebuilding a high-performance Hemi engine, getting the right pistons is crucial for power and reliability. This Mahle MS Piston Set is built for Hemi 370 cubic inch applications, offering a robust forged replacement assembly designed to handle the demands of a performance build.

These pistons feature a 4.055-inch bore and are designed to work with a 3.580-inch stroke and a 6.242-inch connecting rod. The -1cc valve relief and 10.4:1 compression ratio are specified to work with certain cylinder head combinations, so it's important to match these with your build's overall goals. Mahle uses 4032 aluminum alloy for these pistons, which offers a good balance of strength and thermal expansion characteristics suitable for performance street or strip applications. Each piston weighs in at 441 grams, and they come with a 0.984-inch pin.

This set includes all eight pistons needed for a V8 engine. Please note 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 fitment and assembly procedures.