What material are these Mahle pistons made from?

These Mahle MS pistons are forged from 2618 aluminum. This material is chosen for its strength and ability to withstand the high temperatures and pressures found in performance LSX engines.

What compression ratio do these pistons create?

These pistons feature a -5.8cc dish volume, which contributes to a 10.4:1 compression ratio when used with appropriate cylinder heads and a head gasket. This is a common ratio for high-performance naturally aspirated or boosted LSX builds.

Are these pistons legal for use in California?

No, these pistons are not CARB approved and cannot be shipped to California due to emissions regulations.

Mahle LSX Piston Set 4.135in Bore 10.4:1 CR 930226935

Name: Mahle MS Piston Set GM LSX 389cid 4.135x1.304CH 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-389cid-4-135x1-304ch-3-622-stk-6-125-rod-927-pi-t14-348858
Price: 834.05 USD
Availability: BackOrder

Mahle MS Piston Set GM LSX 389cid 4.135x1.304CH 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 389cid engines. Features 4.135in bore and 10.4:1 CR.

Key Features

Fits Chevrolet LSX 389 cu in engines.
Forged from 2618 aluminum for strength and durability.
Features a 4.135-inch bore and a -5.8cc dish volume.
Achieves a 10.4:1 compression ratio with compatible components.
Designed for use with 6.125-inch rods and 0.927-inch wrist pins.
Each piston weighs 483 grams for balanced performance.

This piston set is designed for Chevrolet LSX 389 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

Mahle is well-known for making high-performance engine components, and this MS Piston Set for GM LSX engines is a prime example of their work. If you're building a high-performance LSX engine, these pistons are designed to handle the demands of increased power and stress. They are specifically made for the 389 cubic inch displacement, with a 4.135-inch bore and a 3.622-inch stroke, designed to work with a 6.125-inch rod and a 0.927-inch pin.

These pistons are forged from 2618 aluminum, a strong material commonly used in performance applications for its durability under high temperatures and pressures. They feature a dish volume of -5.8cc, which helps achieve a 10.4:1 compression ratio when paired with the correct cylinder heads and gasket combination. Each piston weighs in at 483 grams, a well-balanced weight for performance builds. This set includes pistons for all 8 cylinders, ready for your custom engine build.

Keep in mind that these pistons are not CARB approved and cannot be shipped to California. Always refer to your engine builder's specifications for proper installation and assembly, including ring and pin selection, and ensure compatibility with your chosen cylinder heads and crankshaft for optimal performance and reliability.