What material are these Mahle pistons made from?

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

What compression ratio do these pistons create?

When used with a 4.250-inch stroke, a 6.385-inch connecting rod, and a 38cc dish volume, these pistons will result in a 13.5:1 compression ratio.

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 BBC Piston Set 4.560in Bore 13.5 CR 928980260

Name: Mahle MS Piston Set BBC 555ci 4.560in Bore 4.25in Stroke 6.385in Rod .990 Pin 38cc 13.5 CR Set of 8
Brand: Mahle
SKU: mahle-mahle-ms-piston-set-bbc-555ci-4-560in-bore-4-25in-stroke-6-385in-rod-990-p-t14-191549
Price: 998.57 USD
Availability: BackOrder

Mahle MS Piston Set BBC 555ci 4.560in Bore 4.25in Stroke 6.385in Rod .990 Pin 38cc 13.5 CR Set of 8

$998.57

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 BBC 555ci engines. Features a 4.560in bore and 13.5 CR for high-performance builds.

Key Features

Set of 8 forged pistons for Big Block Chevy 555ci engines.
4.560 inch bore size.
Designed for a 4.250 inch stroke and 6.385 inch connecting rod.
Features a 38cc dish volume for a 13.5:1 compression ratio.
Constructed from 2618 aluminum for strength and durability.
Includes .990 inch wrist pins.

This piston set is designed for Big Block Chevy 555 cubic inch 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 Big Block Chevy engine, especially a 555 cubic inch stroker, getting the right pistons is crucial for power and reliability. This Mahle MS Piston Set is designed for those demanding builds, offering a solid foundation for serious horsepower.

These pistons are forged from 2618 aluminum, a strong material commonly used in performance applications because it can handle high temperatures and pressures. They feature a 4.560-inch bore and are designed to work with a 4.250-inch stroke and a 6.385-inch connecting rod, resulting in a 13.5:1 compression ratio with a 38cc dish volume. Each piston weighs in at 616 grams, which is a good balance for strength and weight in a performance engine. The .990-inch pin diameter is standard for many performance connecting rods.

This set includes eight pistons, enough for a complete V8 engine. Keep in mind that these pistons are not CARB approved and cannot be shipped to California. Always refer to the manufacturer's installation instructions for proper fitment and assembly procedures.