What is the compression ratio with these pistons?

These Mahle pistons are designed to achieve an 11.5:1 compression ratio when used with compatible cylinder heads and a 3.622-inch stroke crankshaft. The specific ratio can vary slightly based on the exact head gasket thickness and combustion chamber volume.

What material are these pistons made from?

The pistons in this set are forged from 2618 aluminum. This material is chosen for its high strength and ability to withstand the heat and pressure generated in performance engine applications.

Are these pistons suitable for a stock 5.3L engine rebuild?

While these pistons are designed for LS 5.3L engines, their 11.5:1 compression ratio and forged construction are typically intended for performance builds or engines that have been modified for increased power. For a standard stock rebuild, a lower compression ratio piston might be more appropriate.

Mahle LS 5.3L Piston Set 329cid 3.800in Bore 930219900

Name: Mahle MS Chevrolet LS 5.3L Piston Set 329cid 3.800in Bore 3.622 Stroke 8.5cc 11.5 CR Set of 8
Brand: Mahle
SKU: mahle-mahle-ms-chevrolet-ls-5-3l-piston-set-329cid-3-800in-bore-3-622-stroke-8-5-t14-350887
Price: 1013.34 USD
Availability: BackOrder

Mahle MS Chevrolet LS 5.3L Piston Set 329cid 3.800in Bore 3.622 Stroke 8.5cc 11.5 CR Set of 8

$1013.34

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 Chevrolet LS 5.3L Piston Set 329cid 3.800in Bore 3.622 Stroke 8.5cc 11.5 CR Set of 8. A well-built set for rebuilding your LS engine.

Key Features

Fits Chevrolet LS 5.3L 329 cu in engines.
Set includes 8 forged pistons.
3.800 inch bore size.
11.5:1 compression ratio with compatible components.
Forged from 2618 aluminum for strength and durability.
Designed for LS1/2/6 style cathedral port heads.

This piston set is designed for Chevrolet LS 5.3L 329 cu in engines. Always confirm compatibility with your specific engine build and cylinder heads.

⚠️ 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 engine in your Chevrolet LS 5.3L, a solid set of pistons is crucial for performance and reliability. This Mahle MS piston set is built for 329 cubic inch displacements and is designed to work with LS1/2/6 style cathedral port heads, making it a popular choice for engine builds where improved compression and power are the goal.

These pistons feature a dome design that contributes to an 11.5:1 compression ratio when paired with compatible heads and a 3.622-inch stroke crankshaft. They are forged from 2618 aluminum, a material known for its strength and ability to handle high temperatures and pressures, which is essential for performance applications. Each piston weighs 449 grams and uses a 0.945-inch pin. The bore size is 3.800 inches, and the compression height is 1.330 inches, with a rod length of 6.098 inches. This combination of specs means these pistons are engineered for durability and performance under demanding conditions.

This set includes eight pistons, enough for a complete V8 engine. Please note that these pistons are not CARB approved and cannot be shipped to California. Always refer to the manufacturer's installation instructions for proper fitment and assembly procedures.