What is the compression ratio achieved with these pistons?

These Mahle pistons are designed to achieve a 13.1:1 compression ratio when used with the specified crankshaft stroke and rod length. The dish volume is -9cc.

What materials are these pistons made from?

The pistons are forged from 2618 aluminum, a strong and durable material commonly used in high-performance engine components that experience significant stress.

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 Forged Piston Set 4.155in Bore -9cc Dish 197779155

Name: Mahle MS Piston Set Chevy SB 407ci 4.155in Bore 3.5/3.75 Stroke 6.125/6 Rod .927Pin -9cc 13.7CR
Brand: Mahle
SKU: mahle-mahle-ms-piston-set-chevy-sb-407ci-4-155in-bore-3-5-3-75-stroke-6-125-6-ro-t14-132251
Price: 1038.12 USD
Availability: BackOrder

Mahle MS Piston Set Chevy SB 407ci 4.155in Bore 3.5/3.75 Stroke 6.125/6 Rod .927Pin -9cc 13.7CR

$1038.12

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 forged piston set for Chevy SB 393 cu in. 4.155in bore, -9cc dish, 13.1 CR.

Key Features

This product is a Mahle MS forged piston set.
Designed for Chevy Small Block engines with approximately 393 cubic inches displacement.
Features a 4.155-inch bore size.
Includes a -9cc dish volume.
Intended for use with a 3.625-inch stroke crankshaft and a 6.125-inch connecting rod.
Contributes to a 13.1:1 compression ratio.

This piston set is designed for Chevrolet Small Block 393 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

This Mahle MS piston set is designed for Chevy Small Block engines, specifically for builds targeting around 393 cubic inches. You get a complete set of pistons, ready to be installed in your performance engine. These pistons are forged from 2618 aluminum, a strong material chosen for its durability under high stress, making them a solid choice for serious engine builds where reliability is key.

With a 4.155-inch bore and a -9cc dish volume, these pistons are engineered to work with a 3.625-inch stroke crankshaft and a 6.125-inch connecting rod, contributing to a 13.1:1 compression ratio. The included .927-inch pins are also well-built for the demands of a performance application. The 414-gram weight per piston is typical for forged units of this size, balancing strength with reasonable reciprocating mass.

Keep in mind that these pistons are not CARB approved and cannot be shipped to California. If you're building a high-performance engine and need pistons that can handle the stress, this Mahle set is a well-regarded option.