What is the compression ratio achieved with these pistons?

These pistons feature a -6cc dish. When used with the appropriate crankshaft and connecting rods for a 347ci engine, they are designed to achieve a 10.1 compression ratio.

What are the key dimensions of these pistons?

This set is for a 4.030 inch bore. The pistons have a -6cc dish, include .927 inch wrist pins, and each weighs approximately 402 grams. They are intended for use with a 3.4 inch stroke crankshaft and 5.4 inch connecting rods.

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 SBF 347ci Piston Set 4.030in Bore 930244730

Name: Mahle MS Piston Set SBF 347ci 4.030in Bore 3.4in Stroke 5.4in Rod .927 Pin -6cc 10.1 CR Set of 8
Brand: Mahle
SKU: mahle-mahle-ms-piston-set-sbf-347ci-4-030in-bore-3-4in-stroke-5-4in-rod-927-pin--t14-28885
Price: 783.94 USD
Availability: BackOrder

Mahle MS Piston Set SBF 347ci 4.030in Bore 3.4in Stroke 5.4in Rod .927 Pin -6cc 10.1 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 SBF 347ci engines. Features a 4.030in bore and -6cc dish for a 10.1 CR.

Key Features

Fits Ford Small Block 347 cubic inch engines.
Forged from 4032 aluminum for strength and heat resistance.
4.030 inch bore size.
-6cc piston dish helps achieve a 10.1 compression ratio.
Includes .927 inch wrist pins.
Each piston weighs approximately 402 grams.

This piston set is designed for Ford Small Block 347 cubic inch 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

If you're building a high-performance Ford Small Block 347 cubic inch engine, a solid set of pistons is where it all starts. This Mahle MS piston set is designed for that kind of build, giving you the foundation for serious power. They're forged from 4032 aluminum, which is a strong material that also handles heat well, making it a popular choice for performance applications where reliability is key.

This set is specifically for a 347ci engine with a 4.030-inch bore. The pistons feature a -6cc dish, which, when paired with the right crankshaft and connecting rods, helps achieve a 10.1 compression ratio. This compression level is a good target for many naturally aspirated performance builds, offering a noticeable bump in power without being so high that you run into detonation issues on pump gas, assuming proper tuning. The included pins are .927 inches, a common size for performance connecting rods, and the overall weight of each piston is around 402 grams, which helps with engine balance and responsiveness.

When you're putting together an engine like this, every component matters. Mahle is a well-known name in engine parts, and this set is built to meet the demands of a performance 347 build. Keep in mind that these pistons are not CARB approved and cannot be shipped to California. You'll also want to ensure you have the correct connecting rods (5.4 inches specified here) and crankshaft (3.4-inch stroke) to match these pistons for optimal performance and fit.