What material are these Mahle pistons made from?

These Mahle MS pistons are forged from 4032 aluminum. This material is chosen for its strength and durability, making it well-suited for performance engine builds.

What is the compression ratio achieved with these pistons?

When used with a compatible crankshaft, connecting rod, and head gasket combination, these pistons are designed to achieve a 10.5:1 compression ratio. This is partly due to the -5.8cc dish volume in each piston.

Are these pistons compatible with all GM LS engines?

These pistons are specifically listed for Chevrolet LS 366 cu in engines with a 4.010 inch bore. It is important to verify that your specific LS engine variant matches these specifications before purchase.

Mahle GM LS Piston Set 4.010in Bore 930227710

Name: Mahle MS Piston Set GM LS 364ci 4.010in Bore 3.622in Stk 6.098in Rod .945 Pin -5.8cc Set of 8
Brand: Mahle
SKU: mahle-mahle-ms-piston-set-gm-ls-364ci-4-010in-bore-3-622in-stk-6-098in-rod-945-p-t14-711917
Price: 907.99 USD
Availability: BackOrder

Mahle MS Piston Set GM LS 364ci 4.010in Bore 3.622in Stk 6.098in Rod .945 Pin -5.8cc Set of 8

$907.99

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 364ci engines. Features a 4.010in bore and -5.8cc dish for a 10.5:1 compression ratio.

Key Features

Fits Chevrolet LS 366 cu in engines.
Forged from 4032 aluminum for strength and durability.
4.010 inch bore diameter.
3.622 inch stroke and 6.098 inch rod length.
-5.8cc valve reliefs contribute to a 10.5:1 compression ratio.
Each piston weighs 431 grams.

This piston set is designed for Chevrolet LS 366 cu in engines. Please verify compatibility with your specific engine build.

⚠️ 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

These Mahle MS pistons start with a 4.010 inch bore diameter, a critical measurement for rebuilding your GM LS engine. They are forged from 4032 aluminum, a material known for its strength and durability, making them a solid choice for performance builds. With a 3.622 inch stroke and a 6.098 inch rod length, these pistons are designed to work with specific crankshaft and connecting rod combinations to achieve a target compression ratio of 10.5:1, thanks to their -5.8cc valve reliefs.

Each piston weighs in at 431 grams, which is a notable detail for engine builders balancing rotating assembly weight. The 0.945 inch pin diameter is standard for many LS applications, ensuring compatibility with a wide range of connecting rods. Mahle is a well-known name in engine components, and this set of eight pistons is built to meet the demands of a performance rebuild, whether you're looking for improved power or simply a reliable replacement for a worn-out engine.

This set includes all eight pistons needed for a complete engine build. Please note that these pistons are not CARB approved and cannot be shipped to California. Always refer to your engine builder's specifications and Mahle's installation instructions for proper assembly and break-in procedures.