What is the compression ratio achieved with these pistons?

These pistons are designed to achieve a 9.9:1 compression ratio. This is calculated based on the piston's -6.5cc valve relief dish and assumes standard deck height and cylinder head volume for a 342 cubic inch Ford Small Block application.

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

The pistons are forged from 4032 aluminum. This alloy is chosen for its strength and its thermal expansion properties, which are similar to steel. This allows for tighter piston-to-wall clearances when cold, reducing noise and wear, and ensures reliable performance as the engine heats up.

Are these pistons suitable for all types of engine builds?

These pistons are a well-built option for performance-oriented Ford Small Block 342ci engines. However, they are not CARB approved and cannot be shipped to California. Always consult with your engine builder to ensure they are the right choice for your specific build goals and local regulations.

Mahle SBF 342ci Forged Piston Set 930244700

Name: Mahle MS Piston Set SBF 342ci 4.000in Bore 3.4in Stroke 5.4in Rod .927 Pin -6cc 9.8 CR Set of 8
Brand: Mahle
SKU: mahle-mahle-ms-piston-set-sbf-342ci-4-000in-bore-3-4in-stroke-5-4in-rod-927-pin--t14-29064
Price: 783.94 USD
Availability: BackOrder

Mahle MS Piston Set SBF 342ci 4.000in Bore 3.4in Stroke 5.4in Rod .927 Pin -6cc 9.8 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 MS Piston Set for Ford Small Block 342ci.

Key Features

Fits Ford Small Block 342 cu in engines.
Forged from 4032 aluminum for strength and durability.
Features a 4.000-inch bore and -6.5cc valve relief dish.
Designed for a 3.400-inch stroke and 5.400-inch connecting rod.
Includes a 0.927-inch pin diameter.
Contributes to a 9.9:1 compression ratio.

This piston set is designed for Ford Small Block 342 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

This is a Mahle MS Piston Set designed for Ford Small Block 342 cubic inch engines. These pistons are forged from 4032 aluminum, a material known for its strength and durability, making them a solid choice for performance builds where reliability under stress is key. They feature a 4.000-inch bore and are designed to work with a 3.400-inch stroke and a 5.400-inch connecting rod, with a 0.927-inch pin diameter. The -6.5cc valve relief dish contributes to a 9.9:1 compression ratio when paired with the right cylinder head and gasket combination, offering an improved performance feel without going to an extreme compression level.

Each piston weighs in at 392 grams, which is a notable weight for a forged piston of this size, indicating a well-built component. The 4032 aluminum alloy is chosen for its expansion characteristics, which are more similar to steel than older 2618 alloys. This means they can run with tighter clearances when cold, reducing noise and wear, and expand predictably as they heat up, maintaining integrity under demanding conditions. This set includes all eight pistons needed for a V8 engine.

Please be aware that this piston set is not CARB approved and cannot be shipped to California. It also carries a Prop 65 warning. Ensure you check all manufacturer specifications and consult with your engine builder to confirm compatibility and proper installation procedures for your specific application.