What is the compression ratio achieved with these pistons?

These Mahle pistons feature a -6.5cc dish volume, which helps achieve a 10.9:1 compression ratio when used with compatible cylinder heads and gaskets for the Ford 385ci engine.

What material are these pistons made from and why is it important?

The pistons are forged from 4032 aluminum. This material is chosen for its superior strength and resistance to heat and stress, making it well-suited for high-performance engine builds where durability is critical.

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 385ci Ford SB Piston Set 930173140

Name: Mahle MS Piston Set Ford Flat Top SB 385ci 4.040in Bore 3.75in Stk 6.2in Rod .927 Pin -6cc 10.9 CR
Brand: Mahle
SKU: mahle-mahle-ms-piston-set-ford-flat-top-sb-385ci-4-040in-bore-3-75in-stk-6-2in-r-t14-132253
Price: 783.94 USD
Availability: BackOrder

Mahle MS Piston Set Ford Flat Top SB 385ci 4.040in Bore 3.75in Stk 6.2in Rod .927 Pin -6cc 10.9 CR

$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 MS Piston Set for Ford 385ci Small Block engines. Features a 4.040in bore and 10.9:1 compression ratio.

Key Features

Fits Ford 385 cu in. Small Block engines.
Forged 4032 aluminum construction for strength and durability.
4.040 inch bore size.
3.75 inch stroke compatibility.
10.9:1 compression ratio with -6.5cc dish volume.
Includes 0.927 inch wrist pins.

This piston set is designed for Ford 385 cubic inch Small Block 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

If you're rebuilding the engine in your Ford 385 cubic inch Small Block, this Mahle MS Piston Set is a solid choice for getting the most out of your build. Mahle is a well-known name in engine components, and this set is built with performance in mind for that specific 385ci application. These pistons are designed to work with a 4.040-inch bore and a 3.75-inch stroke, contributing to a 10.9:1 compression ratio, which is great for street performance and mild racing applications where premium fuel is used.

The pistons themselves are forged from 4032 aluminum, a material chosen for its strength and durability under high heat and stress, making them suitable for demanding engine builds. They feature a flat-top design with a -6.5cc volume, which is crucial for achieving that 10.9:1 compression ratio when paired with the correct cylinder heads and gasket thickness. The set includes a 0.927-inch pin and is designed for a 6.2-inch connecting rod, ensuring proper geometry within the engine. Each piston weighs in at approximately 411 grams, which is a good balance for performance and reliability in this engine size.

When planning your engine build, remember that these pistons are not CARB approved and cannot be shipped to California. It's always a good idea to consult your engine builder or a trusted mechanic to ensure these pistons are the right fit for your specific combination of components, including cylinder heads, camshaft, and crankshaft, to achieve your desired performance goals and maintain engine longevity.