What is the compression ratio of this piston set?

This Mahle piston set is designed to achieve a 10.8:1 compression ratio. This is calculated based on the piston's dome volume, bore size, stroke, and head gasket thickness.

Are these pistons suitable for a daily driver or a dedicated performance build?

These pistons are forged from 4032 aluminum alloy, which is well-suited for performance applications due to its strength and thermal expansion characteristics. They are ideal for high-performance builds where increased power and durability are desired.

What is the significance of the 4032 aluminum alloy?

The 4032 aluminum alloy offers better thermal expansion properties compared to 2618 alloy, meaning it expands less when heated. This allows for tighter piston-to-wall clearances, which can lead to quieter operation and improved oil control in performance engines.

Mahle Forged Piston Set 4.075in Bore 10.8CR 930223675

Name: Mahle MS LS Piston Set 378ci 4.075in Bore 3.622 Stroke 6.098 Rod 0.943 Pin 0cc 10.8CR - Set of 8
Brand: Mahle
SKU: mahle-mahle-ms-ls-piston-set-378ci-4-075in-bore-3-622-stroke-6-098-rod-0-943-pin-t14-848292
Price: 915.17 USD
Availability: BackOrder

Mahle MS LS Piston Set 378ci 4.075in Bore 3.622 Stroke 6.098 Rod 0.943 Pin 0cc 10.8CR - Set of 8

$915.17

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 378ci engines. Features a 4.075in bore and 10.8:1 compression ratio.

Key Features

Fits GM LS 378 cu in. engines.
Forged from 4032 aluminum alloy for strength and thermal properties.
4.075 inch bore diameter.
0cc valve relief volume.
10.8:1 compression ratio.
Includes 0.943 inch wrist pins.

This piston set is designed for GM LS 378 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, this Mahle MS LS piston set is built for high-performance GM LS engines displacing 378 cubic inches. Each piston features a 4.075-inch bore and a 0cc valve relief, contributing to a robust 10.8:1 compression ratio when paired with the specified components. The 3.622-inch stroke and 6.098-inch connecting rod length are critical dimensions for achieving the desired engine displacement and performance characteristics.

These pistons are designed with a 0.943-inch wrist pin, a common size for many LS engine builds, ensuring compatibility with a wide range of aftermarket and stock connecting rods. Weighing in at 503 grams each, these pistons offer a balance of strength and reasonable weight for their application. The 4032 aluminum alloy is known for its good thermal expansion properties, making it suitable for performance applications where temperatures can rise significantly.

This set includes eight pistons, essential for a complete engine rebuild or performance upgrade on V8 LS engines. Please note that these pistons are not CARB approved and cannot be shipped to California. It's always recommended to consult your engine builder or a qualified mechanic to ensure these pistons are the correct choice for your specific build and to obtain detailed installation instructions, including proper ring gap and assembly procedures.