What is the compression ratio of these pistons?

These Mahle pistons are designed to achieve a 10.0:1 compression ratio when used with the specified stroke and rod length. This is a common target for performance Hemi builds seeking a balance of power and drivability.

What material are these pistons made from?

The pistons are forged from 4032 aluminum. This material is chosen for its strength and its favorable thermal expansion characteristics, which help maintain consistent clearances as the engine heats up.

Are these pistons compatible with all Hemi engines?

This specific set is intended for 370 cubic inch Hemi engines with a 4.055-inch bore. It's important to confirm your engine's exact displacement and bore size to ensure proper fitment.

Mahle Hemi Piston Set 4.055in Bore 930277655

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-t14-29256
Price: 904.93 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

$904.93

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. Features a 4.055in bore and 10.0 CR for improved performance.

Key Features

Fits Chrysler Hemi 370 cu in engines.
Forged 4032 aluminum construction for strength and thermal stability.
4.055 inch bore size.
-1cc valve relief volume.
10.0:1 compression ratio.
Designed for a 3.58 inch stroke and 6.24 inch connecting rod.

This piston set is designed for Chrysler Hemi 370 cu in engines. Please verify compatibility with your specific engine configuration.

⚠️ 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

When you're rebuilding a Hemi engine for serious performance, the pistons are a critical component. This Mahle MS Piston Set is built for 370 cubic inch Hemi applications, featuring a 4.055-inch bore size. Mahle is a well-known name in engine components, and these pistons are designed to handle the demands of a performance Hemi build.

These pistons are forged from 4032 aluminum, a material chosen for its strength and thermal expansion properties, which helps maintain proper clearances at operating temperature. They have a -1cc valve relief volume and a 10.0:1 compression ratio, carefully calculated to work with a 3.58-inch stroke and a 6.24-inch connecting rod. The included pin is 0.984 inches, a common size for performance Hemi builds. Each piston weighs in at 441 grams, contributing to a balanced rotating assembly.

This set includes eight pistons, enough for a complete V8 engine. Please note that these pistons are not CARB approved and cannot be shipped to California. It's always a good idea to consult your engine builder or a trusted mechanic to ensure these pistons are the right choice for your specific Hemi build and to confirm any other components needed for installation.