What is the compression ratio with this piston set?

This Mahle MS Piston Set features a -26cc dish volume, which results in a 9.2:1 compression ratio when used with the specified engine configuration. This is a common ratio for performance builds seeking a balance of power and pump gas compatibility.

What material are these pistons made from?

These pistons are forged from 4032 aluminum alloy. This material is chosen for its strength and favorable thermal expansion characteristics, making it well-suited for performance engines that experience higher stresses and temperatures.

Are these pistons legal for use in California?

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

Mahle SBF 394ci Piston Set 930248140

Name: Mahle MS Piston Set SBF 394ci 4.040in Bore 3.85in Stroke 5.956in Rod .912 Pin -26cc 9.2 CR Set of 8
Brand: Mahle
SKU: mahle-mahle-ms-piston-set-sbf-394ci-4-040in-bore-3-85in-stroke-5-956in-rod-912-p-t14-29428
Price: 860.80 USD
Availability: BackOrder

Mahle MS Piston Set SBF 394ci 4.040in Bore 3.85in Stroke 5.956in Rod .912 Pin -26cc 9.2 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 Ford Small Block 394ci engines. 4.040in bore, 9.2 CR. Set of 8.

Key Features

Fits Ford Small Block 394 cu in. engines.
4.040 inch bore size.
3.85 inch stroke compatibility.
5.956 inch rod length.
.912 inch pin diameter.
-26cc dish volume for a 9.2:1 compression ratio.

This piston set is designed for Ford Small Block 394 cu in. engines. Please verify fitment for your specific application.

⚠️ 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

Secure CheckoutFast Shipping631-982-0042

Product Details

This Mahle MS Piston Set is built for Ford Small Block 394 cubic inch engines. If you're rebuilding the heart of your performance Ford, these pistons are a solid choice for handling increased power and stress. They're designed to work with a 4.040-inch bore and a 3.85-inch stroke, featuring a 5.956-inch rod length and a .912-inch pin diameter. The -26cc dish volume results in a 9.2:1 compression ratio, which is a popular target for many performance builds looking for a good balance of power and pump gas drivability.

Mahle uses a 4032 aluminum alloy for these pistons, a well-known material in performance engine building. This alloy offers a good balance of strength and thermal expansion properties, making it suitable for demanding applications where reliability is key. Each piston weighs in at 473 grams, which is a reasonable weight for a forged piston of this size. The set includes eight pistons, all the necessary components for a complete engine rebuild. Remember that these pistons are not CARB approved and cannot be shipped to California.