What is the compression ratio achieved with these pistons?

These Mahle pistons feature a 2.0cc dish volume, which results in a 10.9:1 compression ratio when used with compatible cylinder heads and gaskets. This ratio is suitable for performance street or boosted applications.

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

The pistons are forged from 4032 aluminum alloy. This material offers a good balance of strength and controlled thermal expansion, making it well-suited for performance engines that generate significant heat and require precise clearances.

Are these pistons compatible with all GM LS engines?

This set is specifically designed for GM LS engines with a 370 cubic inch displacement and a 4.030-inch bore. While many LS engines share common components, it's crucial to confirm that your specific engine build matches these specifications before installation.

Mahle GM LS Piston Set 4.030in Bore 197719230

Name: Mahle MS Piston Set GM LS 370ci 4.030in Bore 3.622stk 6.125in Rod 0.927 Pin 2cc 10.6 CR Set of 8
Brand: Mahle
SKU: mahle-mahle-ms-piston-set-gm-ls-370ci-4-030in-bore-3-622stk-6-125in-rod-0-927-pi-t14-29420
Price: 867.88 USD
Availability: BackOrder

Mahle MS Piston Set GM LS 370ci 4.030in Bore 3.622stk 6.125in Rod 0.927 Pin 2cc 10.6 CR Set of 8

$867.88

On Backorder

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

Mahle forged piston set for GM LS 370ci engines. 4.030in bore, 10.9 CR. Set of 8.

Key Features

This piston set fits GM LS 370 cubic inch engines.
Forged from 4032 aluminum alloy for strength and thermal management.
Features a 4.030-inch bore diameter.
Designed with a 3.622-inch stroke and 6.125-inch connecting rod length.
Includes a 0.927-inch wrist pin diameter.
The 2.0cc dish volume results in a 10.9:1 compression ratio.

This piston set is designed for GM LS 370 cubic inch 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

Forged from 4032 aluminum alloy, these Mahle MS pistons are built for the demands of a 370 cubic inch GM LS engine. The 4.030-inch bore size is a common specification for stroker builds, and the 3.622-inch stroke combined with a 6.125-inch connecting rod creates a robust combination. Mahle's choice of 4032 aluminum is notable because it offers a good balance of strength and thermal expansion properties, making it suitable for performance applications where tighter tolerances can be maintained. This material helps manage heat effectively, which is crucial for engine longevity under load.

With a 2.0cc dish volume, these pistons achieve a 10.9:1 compression ratio when paired with the appropriate cylinder heads and gasket combination. This compression level is well-suited for naturally aspirated builds aiming for strong street performance, or for boosted applications where careful tuning can manage detonation. The 0.927-inch pin diameter is standard for many performance connecting rods, ensuring broad compatibility. Each piston weighs in at approximately 480 grams, contributing to a balanced rotating assembly when installed as a complete set of eight.

This set is designed for builders looking to assemble a high-performance GM LS engine. It's important to note that these pistons are not CARB approved and cannot be shipped to California. For a successful build, ensure you have the correct cylinder heads, connecting rods, and crankshaft to match the specifications of this piston set. Always refer to Mahle's installation instructions for precise clearances and assembly procedures.