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 a popular choice for performance engine builds.

What is the compression ratio achieved with this piston set?

This piston set is designed to achieve a 10.5:1 compression ratio when used with compatible components. This ratio is suitable for many performance-oriented LS engine builds.

Are these pistons compatible with all GM LS engines?

This specific piston set is designed for GM LS engines with a 365 cubic inch displacement and a 4.005-inch bore. It's important to confirm your engine's specifications to ensure proper fitment.

Mahle GM LS Piston Set 4.005in Bore 197719205

Name: Mahle MS Piston Set GM LS 365ci 4.005in Bore 3.622stk 6.125in Rod 0.927 Pin 2cc 10.5 CR Set of 8
Brand: Mahle
SKU: mahle-mahle-ms-piston-set-gm-ls-365ci-4-005in-bore-3-622stk-6-125in-rod-0-927-pi-t14-29418
Price: 867.88 USD
Availability: BackOrder

Mahle MS Piston Set GM LS 365ci 4.005in Bore 3.622stk 6.125in Rod 0.927 Pin 2cc 10.5 CR Set of 8

$867.88

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 365ci engines. Features a 4.005in bore and 10.5:1 compression ratio for improved performance.

Key Features

Fits GM LS 365 cu in engines.
Forged 4032 aluminum construction for strength and durability.
4.005 inch bore size.
3.622 inch stroke with 6.125 inch rod length.
Achieves a 10.5:1 compression ratio.
Features a 0.927 inch pin diameter and 2.0cc valve relief.

This piston set is designed for Chevrolet LS engines with a 365 cubic inch displacement. 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

If you're building or rebuilding a GM LS engine, Mahle's MS Piston Set is a solid choice for getting more out of your 365 cubic inch displacement. This set is designed for a 4.005-inch bore and features a 3.622-inch stroke with a 6.125-inch rod length, all working together to achieve a 10.5:1 compression ratio. These pistons are forged from 4032 aluminum, a material known for its strength and durability, making them well-suited for performance applications where reliability is key. Each piston weighs in at 470 grams, contributing to a balanced rotating assembly.

The 0.927-inch pin diameter is standard for many LS applications, and the 2.0cc valve relief volume is designed to work with common LS cylinder head configurations. Mahle is a well-known name in engine components, and this piston set reflects their commitment to producing well-built parts that perform. When you're aiming for improved performance and need a reliable foundation for your engine build, these pistons offer a strong starting point. Remember that these pistons are not CARB approved and cannot be shipped to California.