What is the compression ratio with these pistons?

These Mahle pistons feature a -5.8cc dish, which results in a 10.4:1 compression ratio when used with the specified stroke, rod, and cylinder head volume for a 387 cubic inch LSX engine.

What material are these pistons made from?

The pistons in this set are forged from 2618 aluminum. This material is known for its strength and ability to handle the high temperatures and pressures found in performance engine applications.

Are these pistons compatible with all LSX engines?

This specific set is designed for 387 cubic inch LSX engines with a 4.125-inch bore and is intended to be used with a 3.622-inch stroke crankshaft and 6.125-inch connecting rod. It is crucial to verify these dimensions against your engine's specifications.

Mahle LSX 387cid Piston Set 930226925

Name: Mahle MS Piston Set GM LSX 387cid 4.125x1.304CH 3.622 Stk 6.125 Rod .927 Pin -5.8cc 10.4CR Set of 8
Brand: Mahle
SKU: mahle-mahle-ms-piston-set-gm-lsx-387cid-4-125x1-304ch-3-622-stk-6-125-rod-927-pi-t14-348856
Price: 834.05 USD
Availability: BackOrder

Mahle MS Piston Set GM LSX 387cid 4.125x1.304CH 3.622 Stk 6.125 Rod .927 Pin -5.8cc 10.4CR Set of 8

$834.05

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 Piston Set for GM LSX 387cid engines. Forged aluminum construction for high-performance builds.

Key Features

Fits GM LSX 387 cu in. engines.
Set includes pistons for 8 cylinders.
Forged from 2618 aluminum for strength and durability.
Features a 4.125-inch bore and 1.304-inch compression height.
Designed for a 3.622-inch stroke crankshaft and 6.125-inch connecting rod.
Includes a -5.8cc dish for a 10.4:1 compression ratio.

This piston set is designed for Chevrolet LSX 387 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

If you're building a high-performance GM LSX engine, this Mahle MS Piston Set is a solid choice for your 387 cubic inch application. Mahle is a well-known name in engine components, and this set is designed to handle the demands of a performance build. These pistons are forged from 2618 aluminum, a material chosen for its strength and ability to withstand high temperatures and pressures common in performance engines.

This set features pistons with a 4.125-inch bore and a 1.304-inch compression height, designed to work with a 3.622-inch stroke crankshaft and a 6.125-inch connecting rod. The pistons have a -5.8cc dish, which, combined with the other specifications, results in a 10.4:1 compression ratio. This compression ratio is a popular target for naturally aspirated or boosted LSX builds, offering a good balance of power and drivability. Each piston weighs in at 479 grams, contributing to a well-balanced rotating assembly when paired with appropriate connecting rods and a crankshaft.

This set includes pistons for an 8-cylinder engine and comes with a 0.927-inch pin. It's important to note that these pistons are not CARB approved and cannot be shipped to California. Always refer to the manufacturer's detailed specifications and installation instructions to ensure proper fitment and assembly with your specific engine components.