What is the compression ratio of these pistons?

These Mahle MS pistons are designed to achieve a 9.6:1 compression ratio. This is calculated based on the piston's -2.1cc valve reliefs and the engine's 329 cubic inch displacement.

What material are these pistons made from?

The pistons are forged from 2618 aluminum alloy. This material is chosen for its strength and durability, making it suitable for high-performance engine applications.

Are these pistons compatible with all LS engines?

This set is specifically designed for Chevrolet LS1, LS2, and LS6 engines with a 329 cubic inch displacement and a 3.800-inch bore. It is important to verify fitment with your specific engine build, especially regarding connecting rod length and wrist pin size.

Mahle LS1/2/6 5.3L Piston Set 3.800in Bore 930218400

Name: Mahle MS Piston Set Chevrolet LS1/2/6 5.3L 329ci 3.800in Bore 3.622in Stk 9.6:1 CR -2.1cc Set of 8
Brand: Mahle
SKU: mahle-mahle-ms-piston-set-chevrolet-ls1-2-6-5-3l-329ci-3-800in-bore-3-622in-stk--t14-168908
Price: 1009.86 USD
Availability: BackOrder

Mahle MS Piston Set Chevrolet LS1/2/6 5.3L 329ci 3.800in Bore 3.622in Stk 9.6:1 CR -2.1cc Set of 8

$1009.86

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 Chevrolet LS1/2/6 5.3L engines. 3.800in bore, 9.6:1 CR.

Key Features

Fits Chevrolet LS1, LS2, and LS6 engines.
Forged from 2618 aluminum alloy for strength and durability.
3.800-inch bore size.
Features -2.1cc valve reliefs for camshaft clearance.
Achieves a 9.6:1 compression ratio.
Designed for use with 6.125-inch connecting rods and 0.927-inch wrist pins.

This piston set is designed for Chevrolet LS 329 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

Forged from 2618 aluminum alloy, this Mahle MS Piston Set is built for the demands of high-performance Chevrolet LS1, LS2, and LS6 engines. These pistons feature a 3.800-inch bore and a 3.622-inch stroke, designed to work with a 6.125-inch connecting rod and a 0.927-inch wrist pin. The -2.1cc valve reliefs are precisely machined to accommodate larger camshaft profiles, contributing to a 9.6:1 compression ratio with a 329 cubic inch displacement.

Mahle's MS series pistons are a popular choice for engine builders looking for a well-built, reliable component for their LS engine builds. The 2618 aluminum construction offers excellent strength and durability, crucial for handling increased cylinder pressures and temperatures found in performance applications. Each piston weighs in at 431 grams, contributing to a balanced rotating assembly for smoother operation and reduced engine stress. This set includes all eight pistons, ready for your next engine rebuild or performance upgrade.

When rebuilding your LS engine, ensuring proper piston-to-wall clearance and ring gap is critical for optimal performance and longevity. Always refer to the manufacturer's installation instructions for precise specifications and recommended assembly procedures. Please note that this piston set is not CARB approved and cannot be shipped to California.