What material are these Mahle pistons made from?

These Mahle pistons are forged from 2618 aluminum. This material is known for its strength and ability to perform under the high temperatures and pressures found in performance engines.

What is the compression ratio with these pistons?

With a -4.2cc valve relief volume and designed for a 3.622-inch stroke, these pistons contribute to a calculated compression ratio of 9.7:1. This is suitable for many performance LS engine builds.

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 check local emissions regulations before purchasing.

Mahle LS 5.3L Piston Set 3.790" Bore 930218890

Name: Mahle MS Chevrolet LS 5.3L Piston Set 327cid 3.790in Bore 3.622 Stroke -4.2cc 9.7 CR Set of 8
Brand: Mahle
SKU: mahle-mahle-ms-chevrolet-ls-5-3l-piston-set-327cid-3-790in-bore-3-622-stroke-4-2-t14-367841
Price: 849.72 USD
Availability: BackOrder

Mahle MS Chevrolet LS 5.3L Piston Set 327cid 3.790in Bore 3.622 Stroke -4.2cc 9.7 CR Set of 8

$849.72

On Backorder

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

Mahle LS 5.3L Piston Set 327cid 3.790in Bore 3.622 Stroke -4.2cc 9.7 CR Set of 8

Key Features

Fits Chevrolet LS 327 cu in engines.
Forged from 2618 aluminum for strength and durability.
Features a 3.790-inch bore and 3.622-inch stroke.
Valve relief volume of -4.2cc contributes to a 9.7:1 compression ratio.
Each piston weighs 423 grams for a balanced rotating assembly.
Set includes eight pistons for a complete engine build.

This piston set is designed for Chevrolet LS 327 cubic inch engines. Always confirm 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

Mahle is a well-known name in engine components, and this piston set for Chevrolet LS 5.3L engines continues that legacy. If you're rebuilding the heart of your 327 cubic inch LS engine, these pistons are built to handle the demands of a performance build. They are designed to fit with a 3.790-inch bore and a 3.622-inch stroke, providing a solid foundation for your engine's power output.

These pistons are forged from 2618 aluminum, a strong material chosen for its durability and ability to withstand high temperatures and pressures common in performance applications. The -4.2cc valve relief volume is specifically designed to work with certain camshaft profiles and cylinder head combinations, contributing to a calculated 9.7:1 compression ratio. Each piston weighs in at 423 grams, a detail that helps ensure balanced rotating assembly for smoother engine operation. This set includes eight pistons, ready for your complete engine build.

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 to ensure optimal performance and longevity of your engine.