What is the compression ratio of this piston set?

This Mahle piston set is designed to achieve a 10.7:1 compression ratio. This is a common target for performance LS engine builds seeking increased power over stock configurations.

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

These pistons are made from 4032 aluminum. This alloy is chosen for performance applications because it offers good strength and durability, especially at higher operating temperatures and pressures found in modified or high-performance engines.

Are these pistons legal for use in California?

No, these pistons are not CARB approved and cannot be shipped to California. It is important to verify local emissions regulations before purchasing and installing performance engine components.

Mahle LS Piston Set 376ci 4.065in Bore 930223665

Name: Mahle MS LS Piston Set 376ci 4.065in Bore 3.622 Stroke 6.098 Rod 0.943 Pin 0cc 10.7CR - Set of 8
Brand: Mahle
SKU: mahle-mahle-ms-ls-piston-set-376ci-4-065in-bore-3-622-stroke-6-098-rod-0-943-pin-t14-848290
Price: 915.17 USD
Availability: BackOrder

Mahle MS LS Piston Set 376ci 4.065in Bore 3.622 Stroke 6.098 Rod 0.943 Pin 0cc 10.7CR - 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 MS LS Piston Set for GM LS 376 cu in engines. 4.065in bore, 10.7:1 CR. Set of 8.

Key Features

This piston set is designed for GM LS 376 cubic inch engines.
Features a 4.065-inch bore and a 3.622-inch stroke.
Achieves a 10.7:1 compression ratio for improved performance.
Constructed from durable 4032 aluminum for strength and heat resistance.
Each piston weighs 498 grams, helping to manage rotating assembly mass.
Includes 0.943-inch wrist pins and is designed for 6.098-inch rod length.

⚠️ 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 the top end of your GM LS engine for increased performance, a strong set of pistons is crucial. This Mahle MS LS Piston Set is built for 376 cubic inch applications, featuring a 4.065-inch bore and a 3.622-inch stroke. These pistons are designed to achieve a 10.7:1 compression ratio, which is a notable bump over stock and ideal for naturally aspirated or forced induction builds looking for more power.

Mahle uses 4032 aluminum for these pistons, a well-known material for its strength and durability, especially under the higher temperatures and pressures found in performance engines. They weigh in at 498 grams each, keeping rotating mass manageable. The included wrist pin measures 0.943 inches, a common size for LS applications, and the rod length specified is 6.098 inches. This set includes all eight pistons needed for a complete engine build.

It's important to note that these pistons are not CARB approved and cannot be shipped to California. Always refer to the manufacturer's detailed installation instructions for proper fitment and assembly procedures, especially regarding ring gap and piston-to-wall clearance, to ensure optimal performance and longevity of your engine build.