What is the compression ratio achieved with these pistons?

These Mahle pistons are designed to achieve a 10.1:1 compression ratio. This is achieved through the piston's -4.2cc dish volume when used with appropriate cylinder heads and gasket combinations for your LS 5.3L engine.

What material are these pistons made from?

The pistons are forged from 2618 aluminum. This is a strong and commonly used material in high-performance engine components, known for its ability to withstand the stresses of demanding engine builds.

Are these pistons compatible with all LS engines?

This specific piston set is designed for Chevrolet LS 325 cubic inch engines with a 3.780-inch bore. It's important to verify your engine's specific displacement and bore size to ensure compatibility.

Mahle LS 5.3L Piston Set 3.78in Bore 930218880

Name: Mahle MS Piston Set LS 5.3L 3.78in Bore 3.622in Stroke 6.125in Rod .927in Pin -4.2cc 10.1 CR
Brand: Mahle
SKU: mahle-mahle-ms-piston-set-ls-5-3l-3-78in-bore-3-622in-stroke-6-125in-rod-927in-p-t14-499356
Price: 849.72 USD
Availability: BackOrder

Mahle MS Piston Set LS 5.3L 3.78in Bore 3.622in Stroke 6.125in Rod .927in Pin -4.2cc 10.1 CR

$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 forged piston set for LS 5.3L 325 cu in engines. Features a 3.78in bore and 10.1:1 compression ratio.

Key Features

Fits Chevrolet LS 325 cu in engines.
Forged from 2618 aluminum for strength and durability.
3.780 inch bore size.
3.622 inch stroke compatibility.
Designed for a 6.125 inch connecting rod and a .927 inch wrist pin.
Features a -4.2cc dish volume for a 10.1:1 compression ratio.

This piston set is designed for Chevrolet LS 325 cu in engines. Not CARB approved, so it cannot be shipped to California.

⚠️ 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 top end of your Chevrolet LS 5.3L engine, this Mahle MS Piston Set is a solid choice for a performance build. These pistons are designed for the 325 cubic inch displacement, featuring a 3.780-inch bore and a 3.622-inch stroke, working with a 6.125-inch rod and a .927-inch pin. They are crafted from 2618 aluminum, a strong material commonly used in high-performance pistons for its durability under stress.

This set is engineered to achieve a 10.1:1 compression ratio, which is a notable increase over stock and suitable for many performance applications. The pistons have a -4.2cc dish volume, which contributes to that compression figure when paired with the correct cylinder heads and gasket combination. Each piston weighs in at 419 grams, offering a good balance for engine dynamics. Mahle is a well-known name in engine components, and these pistons reflect their commitment to well-built parts for demanding engine builds.

Keep in mind that these pistons are not CARB approved and cannot be shipped to California. For a successful rebuild, ensure you have the correct supporting components and follow manufacturer guidelines for installation. This set is a key component for anyone looking to enhance their LS engine's performance.