What is the compression ratio achieved with these pistons?

These Mahle pistons feature a -5cc dish volume. When paired with a 5.7-inch rod and a 3.480/3.500-inch stroke in a 4.040-inch bore Small Block Chevy, they achieve a 10.4:1 compression ratio.

Are these pistons suitable for all Small Block Chevy engines?

This set is specifically designed for Small Block Chevy engines with a 357 cubic inch displacement and a 4.040-inch bore. It's important to confirm your engine's specifications match these requirements before installation.

What other components are typically needed when installing these pistons?

When installing new pistons, you will generally need matching piston rings and rod bearings. It is also recommended to check and potentially replace wrist pins and clips if they are not included or if the originals are worn.

Mahle SBC Piston Set 4.040in Bore 930203640

Name: Mahle MS Piston Set SBC 358ci 4.040in Bore 3.480/3.500stk 5.7in Rod 0.927 Pin -5cc 10.4 CR Set of 8
Brand: Mahle
SKU: mahle-mahle-ms-piston-set-sbc-358ci-4-040in-bore-3-480-3-500stk-5-7in-rod-0-927--t14-29990
Price: 783.94 USD
Availability: BackOrder

Mahle MS Piston Set SBC 358ci 4.040in Bore 3.480/3.500stk 5.7in Rod 0.927 Pin -5cc 10.4 CR Set of 8

$783.94

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 Small Block Chevy 357ci. Features a 4.040in bore and -5cc dish for a 10.4:1 compression ratio.

Key Features

Fits Chevrolet Small Block 357 cu in. engines.
Forged from 4032 aluminum for improved strength and durability.
4.040 inch bore size.
-5cc piston dish volume for a 10.4:1 compression ratio with a 5.7 inch rod.
1.550 inch compression height.
Each piston weighs 499 grams.

This piston set is designed for Chevrolet Small Block 357 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 pistons are forged from 4032 aluminum, a material known for its strength and resistance to expansion, making them a solid choice for performance Small Block Chevy builds. With a 4.040-inch bore and a 3.480/3.500-inch stroke compatibility, they are designed for 357 cubic inch engines. The -5cc dish volume, combined with a 5.7-inch rod length and a 0.927-inch pin, helps achieve a 10.4:1 compression ratio, which is a popular target for many street and strip applications.

The 4032 aluminum construction offers improved durability over cast pistons, especially under the higher stresses of performance engines. Mahle has engineered these pistons with a 1.550-inch compression height and a weight of 499 grams, ensuring they are well-balanced for smooth operation. This set includes eight pistons, ready to be installed in your Small Block Chevy engine.

When rebuilding or upgrading your engine, consider that these pistons are not CARB approved and cannot be shipped to California. Ensure you have the correct supporting components, such as rings and bearings, to complete your engine assembly. Refer to the manufacturer's installation instructions for specific details regarding clearances and assembly procedures.