What is the compression ratio achieved with these pistons?

These Mahle pistons feature a -12cc dish volume. When used with a 4.000 inch stroke and a 6.125 inch connecting rod, they achieve a 10.5:1 compression ratio.

What material are these pistons made from?

The pistons are constructed from 4032 aluminum alloy. This material is chosen for its strength and durability in performance engine applications, while also managing thermal expansion.

Are these pistons compatible with all GM LS engines?

These pistons are specifically designed for GM LS engines with a 404 cubic inch displacement and a 4.010 inch bore. It is important to confirm that these specifications match your intended engine build.

Mahle GM LS 404ci Piston Set 930219310

Name: Mahle MS Piston Set GM LS 404ci 4.010in Bore 4in Stroke 6.125in Rod .927 Pin -12cc 10.5 CR Set of 8
Brand: Mahle
SKU: mahle-mahle-ms-piston-set-gm-ls-404ci-4-010in-bore-4in-stroke-6-125in-rod-927-pi-t14-29982
Price: 860.80 USD
Availability: BackOrder

Mahle MS Piston Set GM LS 404ci 4.010in Bore 4in Stroke 6.125in Rod .927 Pin -12cc 10.5 CR Set of 8

$860.80

On Backorder

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

Mahle MS Piston Set for GM LS 404ci engines. Features a 4.010in bore and 10.5:1 compression ratio for improved performance.

Key Features

Fits GM LS 404 cu in engines.
Forged 4032 aluminum alloy construction for strength and durability.
4.010 inch bore size.
4.000 inch stroke compatibility.
-12cc piston dish volume for a 10.5:1 compression ratio.
Includes 8 pistons with .927 inch wrist pins.

This piston set is designed for GM LS engines with a 404 cubic inch displacement. Please verify compatibility with your specific engine build.

⚠️ 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 building a performance GM LS engine and need a solid set of pistons, this Mahle MS Piston Set is a great choice. These are designed for a 404 cubic inch displacement, with a 4.010 inch bore and a 4.000 inch stroke, giving you the foundation for a powerful engine build. Mahle is a well-known name in engine components, and this set is built to handle the demands of a performance application.

This set features pistons with a -12cc dish volume, which helps achieve a 10.5:1 compression ratio when paired with a 4.000 inch stroke and a 6.125 inch connecting rod. The pistons themselves weigh in at 413 grams, a reasonable weight for forged aluminum pistons of this size. They use a .927 inch wrist pin, a common size for many LS engine builds. The 4032 aluminum alloy construction offers good strength and durability for performance use, balancing strength with thermal expansion characteristics.

This set includes eight pistons, enough for a complete V8 engine. Keep in mind that these pistons are not CARB approved and cannot be shipped to California. Always refer to your specific engine build plans and manufacturer instructions for proper installation and compatibility with other components.