What material are these Mahle pistons made from?

These Mahle MS pistons are forged from 2618 aluminum alloy. This material is chosen for its strength and ability to handle the high stresses and temperatures found in performance engine builds.

What is the calculated compression ratio for this piston set?

With a 9.0cc dish volume, a 3.625-inch stroke, a 6.125-inch rod length, and a 4.155-inch bore, these pistons achieve a calculated compression ratio of 13.6:1. This is suitable for specific performance applications.

Are these pistons legal for use in California?

No, these Mahle pistons are not CARB approved and cannot be shipped to California. Please check local regulations regarding emissions compliance for engine components.

Mahle Forged Pistons 393cid 4.155" Bore 13.6:1 CR Set of 8

Name: Mahle MS Chevrolet Small Block 393cid 4.155 x 1.062RCH 9.0cc 13.6CR Pistons (Set of 8)
Brand: Mahle
SKU: mahle-mahle-ms-chevrolet-small-block-393cid-4-155-x-1-062rch-9-0cc-13-6cr-piston-t14-712216
Price: 1105.25 USD
Availability: BackOrder

Mahle MS Chevrolet Small Block 393cid 4.155 x 1.062RCH 9.0cc 13.6CR Pistons (Set of 8)

$1105.25

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 Chevrolet Small Block 393cid 4.155 x 1.062RCH 9.0cc 13.6CR Pistons (Set of 8). Forged pistons for high-performance builds.

Key Features

Fits Chevrolet Small Block 393 cu in. engines.
Forged from 2618 aluminum alloy for strength and durability.
4.155 inch bore diameter.
9.0cc dish volume and 13.6:1 compression ratio.
Includes a 0.927 inch pin diameter.
Each piston weighs 452 grams.

This piston set is designed for Chevrolet Small Block 393 cu in. engines. 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

These Mahle MS forged pistons start with a 4.155-inch bore diameter, a solid foundation for building a robust 393 cubic inch Chevrolet Small Block engine. The 9.0cc dish volume, combined with a 6.125-inch rod length and a 3.625-inch stroke, results in a calculated compression ratio of 13.6:1. This specific compression ratio is often chosen for naturally aspirated performance applications where premium pump gas or race fuel is available, aiming to extract maximum power from the engine.

Crafted from 2618 aluminum alloy, these pistons are well-suited for the demands of high-performance engines. This material is known for its strength and ability to withstand the high temperatures and pressures generated during combustion in performance applications. The 0.927-inch pin diameter is standard for many performance builds, ensuring compatibility with a wide range of connecting rods. Each piston weighs in at 452 grams, contributing to a balanced rotating assembly when used as a set of eight.

This set includes eight pistons, designed to be a direct replacement for your Chevrolet Small Block engine. It's important to note that these pistons are not CARB approved and cannot be shipped to California. For optimal performance and longevity, ensure proper balancing of the rotating assembly and consult with your engine builder regarding specific tuning requirements for this compression ratio.