What is the compression ratio with these pistons?

These pistons have a -16cc dish volume. When paired with typical cylinder heads for a 357ci Small Block Chevy, this configuration results in a 9.3:1 compression ratio.

What size wrist pin do these pistons use?

The pistons in this set utilize a standard 0.927-inch wrist pin, which is common for many performance Small Block Chevy engine builds.

Can these pistons be shipped to California?

No, this piston set is not CARB approved and cannot be shipped to California due to emissions regulations.

Mahle SBC Piston Set 4.040in Bore 930210840

Name: Mahle MS Piston Set SBC 358ci 4.040in Bore 3.480/3.5stk 6.125in Rod 0.927 Pin -16cc 9.3 CR Set of 8
Brand: Mahle
SKU: mahle-mahle-ms-piston-set-sbc-358ci-4-040in-bore-3-480-3-5stk-6-125in-rod-0-927--t14-30091
Price: 860.80 USD
Availability: BackOrder

Mahle MS Piston Set SBC 358ci 4.040in Bore 3.480/3.5stk 6.125in Rod 0.927 Pin -16cc 9.3 CR Set of 8

$860.80

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 SBC 357ci engines with 4.040in bore. Forged construction for durability.

Key Features

Fits Chevrolet Small Block 357 cu in. engines.
Forged 4032 aluminum construction for strength and durability.
4.040-inch bore size.
Designed for 3.480/3.500-inch stroke crankshafts and 6.125-inch connecting rods.
Includes 0.927-inch wrist pins.
-16cc piston dish volume for a 9.3:1 compression ratio.

This piston set is designed for Chevrolet Small Block 357 cubic inch 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

This is a set of eight Mahle MS forged pistons designed for Chevrolet Small Block engines displacing 357 cubic inches. These pistons feature a 4.040-inch bore and are built to work with a 3.480 or 3.500-inch stroke crankshaft, using a 6.125-inch connecting rod and a 0.927-inch wrist pin. Mahle is a well-known name in engine components, and this set is a solid option for anyone rebuilding or upgrading their SBC engine.

The pistons are forged from 4032 aluminum, which is a strong material that offers good thermal expansion properties, making them suitable for performance applications. Each piston weighs 419 grams and has a -16cc dish volume, resulting in a compression ratio of 9.3:1 when used with a typical cylinder head. This compression ratio is a good balance for many street and strip applications, offering improved performance without being overly sensitive to fuel octane. The 0.927-inch pin size is standard for many performance Small Block Chevy builds.

When installing these pistons, ensure you follow the manufacturer's recommended clearances for bore hone, ring gap, and bearing setup. These pistons are intended for performance engine builds where durability and consistent performance are key. Please note that this part is not CARB approved and cannot be shipped to California. It also carries a Prop 65 warning.